diff --git a/package.json b/package.json
index 32b5d16..86a083c 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "rimraf": "^2.6.1"
   },
   "dependencies": {
-    "express": "^4.15.3",
+    "express": "^4.17.3",
     "path": "^0.12.7"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 2069335..fcbf329 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6,13 +6,20 @@ abbrev@1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.0.tgz#d0554c2256636e2f56e7c2e5ad183f859428d81f"
 
-accepts@1.3.3, accepts@~1.3.3:
+accepts@1.3.3:
   version "1.3.3"
   resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.3.tgz#c3ca7434938648c3e0d9c1e328dd68b622c284ca"
   dependencies:
     mime-types "~2.1.11"
     negotiator "0.6.1"
 
+accepts@~1.3.3, accepts@~1.3.8:
+  version "1.3.8"
+  resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.8.tgz#0bf0be125b67014adcb0b0921e62db7bffe16b2e"
+  dependencies:
+    mime-types "~2.1.34"
+    negotiator "0.6.3"
+
 acorn-jsx@^3.0.0, acorn-jsx@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-3.0.1.tgz#afdf9488fb1ecefc8348f6fb22f464e32a58b36b"
@@ -425,6 +432,21 @@ block-stream@*:
   dependencies:
     inherits "~2.0.0"
 
+body-parser@1.19.2:
+  version "1.19.2"
+  resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.2.tgz#4714ccd9c157d44797b8b5607d72c0b89952f26e"
+  dependencies:
+    bytes "3.1.2"
+    content-type "~1.0.4"
+    debug "2.6.9"
+    depd "~1.1.2"
+    http-errors "1.8.1"
+    iconv-lite "0.4.24"
+    on-finished "~2.3.0"
+    qs "6.9.7"
+    raw-body "2.4.3"
+    type-is "~1.6.18"
+
 boom@2.x.x:
   version "2.10.1"
   resolved "https://registry.yarnpkg.com/boom/-/boom-2.10.1.tgz#39c8918ceff5799f83f9492a848f625add0c766f"
@@ -522,6 +544,10 @@ builtin-modules@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-1.1.1.tgz#270f076c5a72c02f5b65a47df94c5fe3a278892f"
 
+bytes@3.1.2:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.2.tgz#8b0beeb98605adf1b128fa4386403c009e0221a5"
+
 caller-path@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/caller-path/-/caller-path-0.1.0.tgz#94085ef63581ecd3daa92444a8fe94e82577751f"
@@ -701,13 +727,15 @@ console-control-strings@^1.0.0, console-control-strings@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/console-control-strings/-/console-control-strings-1.1.0.tgz#3d7cf4464db6446ea644bf4b39507f9851008e8e"
 
-content-disposition@0.5.2:
-  version "0.5.2"
-  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.2.tgz#0cf68bb9ddf5f2be7961c3a85178cb85dba78cb4"
+content-disposition@0.5.4:
+  version "0.5.4"
+  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.4.tgz#8b82b4efac82512a02bb0b1dcec9d2c5e8eb5bfe"
+  dependencies:
+    safe-buffer "5.2.1"
 
-content-type@~1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.2.tgz#b7d113aee7a8dd27bd21133c4dc2529df1721eed"
+content-type@~1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.4.tgz#e138cc75e040c727b1966fe5e5f8c9aee256fe3b"
 
 convert-source-map@^1.1.0:
   version "1.5.0"
@@ -721,6 +749,10 @@ cookie@0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.3.1.tgz#e7e0a1f9ef43b4c8ba925c5c5a96e806d16873bb"
 
+cookie@0.4.2:
+  version "0.4.2"
+  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.2.tgz#0e41f24de5ecf317947c82fc789e06a884824432"
+
 core-js@^2.4.0:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.4.1.tgz#4de911e667b0eae9124e34254b53aea6fc618d3e"
@@ -763,15 +795,9 @@ debug@2.6.4:
   dependencies:
     ms "0.7.3"
 
-debug@2.6.7:
-  version "2.6.7"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.7.tgz#92bad1f6d05bbb6bba22cca88bcd0ec894c2861e"
-  dependencies:
-    ms "2.0.0"
-
-debug@^2.1.1, debug@^2.2.0, debug@^2.6.8:
-  version "2.6.8"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.8.tgz#e731531ca2ede27d188222427da17821d68ff4fc"
+debug@2.6.9, debug@^2.1.1, debug@^2.2.0, debug@^2.6.8:
+  version "2.6.9"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   dependencies:
     ms "2.0.0"
 
@@ -813,10 +839,14 @@ delegates@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delegates/-/delegates-1.0.0.tgz#84c6e159b81904fdca59a0ef44cd870d31250f9a"
 
-depd@1.1.0, depd@~1.1.0:
+depd@1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.0.tgz#e1bd82c6aab6ced965b97b88b17ed3e528ca18c3"
 
+depd@~1.1.0, depd@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
+
 deprecated@^0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/deprecated/-/deprecated-0.0.1.tgz#f9c9af5464afa1e7a971458a8bdef2aa94d5bb19"
@@ -893,9 +923,9 @@ emitter-steward@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/emitter-steward/-/emitter-steward-1.0.0.tgz#f3411ade9758a7565df848b2da0cbbd1b46cbd64"
 
-encodeurl@~1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.1.tgz#79e3d58655346909fe6f0f45a5de68103b294d20"
+encodeurl@~1.0.1, encodeurl@~1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
 
 end-of-stream@1.0.0:
   version "1.0.0"
@@ -1050,9 +1080,9 @@ esutils@^2.0.0, esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
 
-etag@^1.7.0, etag@~1.8.0:
-  version "1.8.0"
-  resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.0.tgz#6f631aef336d6c46362b51764044ce216be3c051"
+etag@^1.7.0, etag@~1.8.0, etag@~1.8.1:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
 
 event-stream@^3.2.1, event-stream@~3.3.0:
   version "3.3.4"
@@ -1097,38 +1127,40 @@ express@2.5.x:
     mkdirp "0.3.0"
     qs "0.4.x"
 
-express@^4.15.3:
-  version "4.15.3"
-  resolved "https://registry.yarnpkg.com/express/-/express-4.15.3.tgz#bab65d0f03aa80c358408972fc700f916944b662"
+express@^4.17.3:
+  version "4.17.3"
+  resolved "https://registry.yarnpkg.com/express/-/express-4.17.3.tgz#f6c7302194a4fb54271b73a1fe7a06478c8f85a1"
   dependencies:
-    accepts "~1.3.3"
+    accepts "~1.3.8"
     array-flatten "1.1.1"
-    content-disposition "0.5.2"
-    content-type "~1.0.2"
-    cookie "0.3.1"
+    body-parser "1.19.2"
+    content-disposition "0.5.4"
+    content-type "~1.0.4"
+    cookie "0.4.2"
     cookie-signature "1.0.6"
-    debug "2.6.7"
-    depd "~1.1.0"
-    encodeurl "~1.0.1"
+    debug "2.6.9"
+    depd "~1.1.2"
+    encodeurl "~1.0.2"
     escape-html "~1.0.3"
-    etag "~1.8.0"
-    finalhandler "~1.0.3"
-    fresh "0.5.0"
+    etag "~1.8.1"
+    finalhandler "~1.1.2"
+    fresh "0.5.2"
     merge-descriptors "1.0.1"
     methods "~1.1.2"
     on-finished "~2.3.0"
-    parseurl "~1.3.1"
+    parseurl "~1.3.3"
     path-to-regexp "0.1.7"
-    proxy-addr "~1.1.4"
-    qs "6.4.0"
-    range-parser "~1.2.0"
-    send "0.15.3"
-    serve-static "1.12.3"
-    setprototypeof "1.0.3"
-    statuses "~1.3.1"
-    type-is "~1.6.15"
-    utils-merge "1.0.0"
-    vary "~1.1.1"
+    proxy-addr "~2.0.7"
+    qs "6.9.7"
+    range-parser "~1.2.1"
+    safe-buffer "5.2.1"
+    send "0.17.2"
+    serve-static "1.14.2"
+    setprototypeof "1.2.0"
+    statuses "~1.5.0"
+    type-is "~1.6.18"
+    utils-merge "1.0.1"
+    vary "~1.1.2"
 
 extend@^3.0.0, extend@~3.0.0:
   version "3.0.1"
@@ -1200,16 +1232,16 @@ finalhandler@0.5.0:
     statuses "~1.3.0"
     unpipe "~1.0.0"
 
-finalhandler@~1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-1.0.3.tgz#ef47e77950e999780e86022a560e3217e0d0cc89"
+finalhandler@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-1.1.2.tgz#b7e7d000ffd11938d0fdb053506f6ebabe9f587d"
   dependencies:
-    debug "2.6.7"
-    encodeurl "~1.0.1"
+    debug "2.6.9"
+    encodeurl "~1.0.2"
     escape-html "~1.0.3"
     on-finished "~2.3.0"
-    parseurl "~1.3.1"
-    statuses "~1.3.1"
+    parseurl "~1.3.3"
+    statuses "~1.5.0"
     unpipe "~1.0.0"
 
 find-index@^0.1.1:
@@ -1287,14 +1319,18 @@ formidable@1.0.x:
   version "1.0.17"
   resolved "https://registry.yarnpkg.com/formidable/-/formidable-1.0.17.tgz#ef5491490f9433b705faa77249c99029ae348559"
 
-forwarded@~0.1.0:
-  version "0.1.0"
-  resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.1.0.tgz#19ef9874c4ae1c297bcf078fde63a09b66a84363"
+forwarded@0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.2.0.tgz#2269936428aad4c15c7ebe9779a84bf0b2a81811"
 
 fresh@0.5.0:
   version "0.5.0"
   resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.0.tgz#f474ca5e6a9246d6fd8e0953cfa9b9c805afa78e"
 
+fresh@0.5.2:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.2.tgz#3d8cadd90d976569fa835ab1f8e4b23a105605a7"
+
 fresh@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.3.0.tgz#651f838e22424e7566de161d8358caa199f83d4f"
@@ -1676,6 +1712,16 @@ hosted-git-info@^2.1.4:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.4.2.tgz#0076b9f46a270506ddbaaea56496897460612a67"
 
+http-errors@1.8.1:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.8.1.tgz#7c3f28577cbc8a207388455dbd62295ed07bd68c"
+  dependencies:
+    depd "~1.1.2"
+    inherits "2.0.4"
+    setprototypeof "1.2.0"
+    statuses ">= 1.5.0 < 2"
+    toidentifier "1.0.1"
+
 http-errors@~1.5.0:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.5.1.tgz#788c0d2c1de2c81b9e6e8c01843b6b97eb920750"
@@ -1708,6 +1754,12 @@ http-signature@~1.1.0:
     jsprim "^1.2.2"
     sshpk "^1.7.0"
 
+iconv-lite@0.4.24:
+  version "0.4.24"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
+  dependencies:
+    safer-buffer ">= 2.1.2 < 3"
+
 iconv-lite@^0.4.17:
   version "0.4.18"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.18.tgz#23d8656b16aae6742ac29732ea8f0336a4789cf2"
@@ -1755,6 +1807,10 @@ inherits@2.0.3, inherits@^2.0.3, inherits@~2.0.0, inherits@~2.0.1:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
 
+inherits@2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
+
 ini@^1.3.4, ini@~1.3.0:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.4.tgz#0537cb79daf59b59a1a517dff706c86ec039162e"
@@ -1792,9 +1848,9 @@ invert-kv@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/invert-kv/-/invert-kv-1.0.0.tgz#104a8e4aaca6d3d8cd157a8ef8bfab2d7a3ffdb6"
 
-ipaddr.js@1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/ipaddr.js/-/ipaddr.js-1.3.0.tgz#1e03a52fdad83a8bbb2b25cbf4998b4cffcd3dec"
+ipaddr.js@1.9.1:
+  version "1.9.1"
+  resolved "https://registry.yarnpkg.com/ipaddr.js/-/ipaddr.js-1.9.1.tgz#bff38543eeb8984825079ff3a2a8e6cbd46781b3"
 
 is-absolute@^0.2.3:
   version "0.2.6"
@@ -2336,24 +2392,38 @@ micromatch@2.3.11, micromatch@^2.1.5, micromatch@^2.3.7:
     parse-glob "^3.0.4"
     regex-cache "^0.4.2"
 
+mime-db@1.52.0:
+  version "1.52.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.52.0.tgz#bbabcdc02859f4987301c856e3387ce5ec43bf70"
+
 mime-db@~1.27.0:
   version "1.27.0"
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.27.0.tgz#820f572296bbd20ec25ed55e5b5de869e5436eb1"
 
-mime-types@^2.1.12, mime-types@~2.1.11, mime-types@~2.1.15, mime-types@~2.1.7:
+mime-types@^2.1.12, mime-types@~2.1.11, mime-types@~2.1.7:
   version "2.1.15"
   resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.15.tgz#a4ebf5064094569237b8cf70046776d09fc92aed"
   dependencies:
     mime-db "~1.27.0"
 
+mime-types@~2.1.24, mime-types@~2.1.34:
+  version "2.1.35"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.35.tgz#381a871b62a734450660ae3deee44813f70d959a"
+  dependencies:
+    mime-db "1.52.0"
+
 mime@1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.2.4.tgz#11b5fdaf29c2509255176b80ad520294f5de92b7"
 
-mime@1.3.4, "mime@>= 0.0.1":
+mime@1.3.4:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.3.4.tgz#115f9e3b6b3daf2959983cb38f149a2d40eb5d53"
 
+mime@1.6.0, "mime@>= 0.0.1":
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
+
 mimic-fn@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-1.1.0.tgz#e667783d92e89dbd342818b5230b9d62a672ad18"
@@ -2415,6 +2485,10 @@ ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
 
+ms@2.1.3:
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.3.tgz#574c8138ce1d2b5861f0b44579dbadd60c6615b2"
+
 multipipe@^0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/multipipe/-/multipipe-0.1.2.tgz#2a8f2ddf70eed564dff2d57f1e1a137d9f05078b"
@@ -2441,6 +2515,10 @@ negotiator@0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
 
+negotiator@0.6.3:
+  version "0.6.3"
+  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.3.tgz#58e323a72fedc0d6f9cd4d31fe49f51479590ccd"
+
 nested-error-stacks@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/nested-error-stacks/-/nested-error-stacks-1.0.2.tgz#19f619591519f096769a5ba9a86e6eeec823c3cf"
@@ -2701,9 +2779,9 @@ parseuri@0.0.5:
   dependencies:
     better-assert "~1.0.0"
 
-parseurl@~1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.1.tgz#c8ab8c9223ba34888aa64a297b28853bec18da56"
+parseurl@~1.3.1, parseurl@~1.3.3:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.3.tgz#9da19e7bee8d12dff0513ed5b76957793bc2e8d4"
 
 path-exists@^2.0.0:
   version "2.1.0"
@@ -2823,12 +2901,12 @@ progress@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/progress/-/progress-2.0.0.tgz#8a1be366bf8fc23db2bd23f10c6fe920b4389d1f"
 
-proxy-addr@~1.1.4:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-1.1.4.tgz#27e545f6960a44a627d9b44467e35c1b6b4ce2f3"
+proxy-addr@~2.0.7:
+  version "2.0.7"
+  resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.7.tgz#f19fe69ceab311eeb94b42e70e8c2070f9ba1025"
   dependencies:
-    forwarded "~0.1.0"
-    ipaddr.js "1.3.0"
+    forwarded "0.2.0"
+    ipaddr.js "1.9.1"
 
 ps-tree@^1.0.1:
   version "1.1.0"
@@ -2848,14 +2926,18 @@ qs@6.2.1:
   version "6.2.1"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.2.1.tgz#ce03c5ff0935bc1d9d69a9f14cbd18e568d67625"
 
-qs@6.4.0, "qs@>= 0.4.0", qs@~6.4.0:
-  version "6.4.0"
-  resolved "https://registry.yarnpkg.com/qs/-/qs-6.4.0.tgz#13e26d28ad6b0ffaa91312cd3bf708ed351e7233"
+qs@6.9.7, "qs@>= 0.4.0":
+  version "6.9.7"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.9.7.tgz#4610846871485e1e048f44ae3b94033f0e675afe"
 
 qs@~6.3.0:
   version "6.3.2"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.3.2.tgz#e75bd5f6e268122a2a0e0bda630b2550c166502c"
 
+qs@~6.4.0:
+  version "6.4.0"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.4.0.tgz#13e26d28ad6b0ffaa91312cd3bf708ed351e7233"
+
 randomatic@^1.1.3:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/randomatic/-/randomatic-1.1.6.tgz#110dcabff397e9dcff7c0789ccc0a49adf1ec5bb"
@@ -2863,9 +2945,18 @@ randomatic@^1.1.3:
     is-number "^2.0.2"
     kind-of "^3.0.2"
 
-range-parser@~1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.0.tgz#f49be6b487894ddc40dcc94a322f611092e00d5e"
+range-parser@~1.2.0, range-parser@~1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.1.tgz#3cf37023d199e1c24d1a55b84800c2f3e6468031"
+
+raw-body@2.4.3:
+  version "2.4.3"
+  resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.4.3.tgz#8f80305d11c2a0a545c2d9d89d7a0286fcead43c"
+  dependencies:
+    bytes "3.1.2"
+    http-errors "1.8.1"
+    iconv-lite "0.4.24"
+    unpipe "1.0.0"
 
 rc@^1.0.1, rc@^1.1.7:
   version "1.2.1"
@@ -3116,9 +3207,13 @@ rx@4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/rx/-/rx-4.1.0.tgz#a5f13ff79ef3b740fe30aa803fb09f98805d4782"
 
-safe-buffer@^5.0.1:
-  version "5.1.0"
-  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.0.tgz#fe4c8460397f9eaaaa58e73be46273408a45e223"
+safe-buffer@5.2.1, safe-buffer@^5.0.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+
+"safer-buffer@>= 2.1.2 < 3":
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
 
 semver-diff@^2.0.0:
   version "2.1.0"
@@ -3152,23 +3247,23 @@ send@0.15.2:
     range-parser "~1.2.0"
     statuses "~1.3.1"
 
-send@0.15.3:
-  version "0.15.3"
-  resolved "https://registry.yarnpkg.com/send/-/send-0.15.3.tgz#5013f9f99023df50d1bd9892c19e3defd1d53309"
+send@0.17.2:
+  version "0.17.2"
+  resolved "https://registry.yarnpkg.com/send/-/send-0.17.2.tgz#926622f76601c41808012c8bf1688fe3906f7820"
   dependencies:
-    debug "2.6.7"
-    depd "~1.1.0"
+    debug "2.6.9"
+    depd "~1.1.2"
     destroy "~1.0.4"
-    encodeurl "~1.0.1"
+    encodeurl "~1.0.2"
     escape-html "~1.0.3"
-    etag "~1.8.0"
-    fresh "0.5.0"
-    http-errors "~1.6.1"
-    mime "1.3.4"
-    ms "2.0.0"
+    etag "~1.8.1"
+    fresh "0.5.2"
+    http-errors "1.8.1"
+    mime "1.6.0"
+    ms "2.1.3"
     on-finished "~2.3.0"
-    range-parser "~1.2.0"
-    statuses "~1.3.1"
+    range-parser "~1.2.1"
+    statuses "~1.5.0"
 
 sequencify@~0.0.7:
   version "0.0.7"
@@ -3195,14 +3290,14 @@ serve-static@1.12.2:
     parseurl "~1.3.1"
     send "0.15.2"
 
-serve-static@1.12.3:
-  version "1.12.3"
-  resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.12.3.tgz#9f4ba19e2f3030c547f8af99107838ec38d5b1e2"
+serve-static@1.14.2:
+  version "1.14.2"
+  resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.14.2.tgz#722d6294b1d62626d41b43a013ece4598d292bfa"
   dependencies:
-    encodeurl "~1.0.1"
+    encodeurl "~1.0.2"
     escape-html "~1.0.3"
-    parseurl "~1.3.1"
-    send "0.15.3"
+    parseurl "~1.3.3"
+    send "0.17.2"
 
 server-destroy@1.0.1:
   version "1.0.1"
@@ -3224,6 +3319,10 @@ setprototypeof@1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.0.3.tgz#66567e37043eeb4f04d91bd658c0cbefb55b8e04"
 
+setprototypeof@1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.2.0.tgz#66c9a24a73f9fc28cbe66b09fed3d33dcaf1b424"
+
 sigmund@~1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/sigmund/-/sigmund-1.0.1.tgz#3ff21f198cad2175f9f3b781853fd94d0d19b590"
@@ -3347,7 +3446,11 @@ sshpk@^1.7.0:
     jsbn "~0.1.0"
     tweetnacl "~0.14.0"
 
-"statuses@>= 1.3.1 < 2", statuses@~1.3.0, statuses@~1.3.1:
+"statuses@>= 1.3.1 < 2", "statuses@>= 1.5.0 < 2", statuses@~1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
+
+statuses@~1.3.0, statuses@~1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.3.1.tgz#faf51b9eb74aaef3b3acf4ad5f61abf24cb7b93e"
 
@@ -3523,6 +3626,10 @@ to-fast-properties@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-1.0.3.tgz#b83571fa4d8c25b82e231b06e3a3055de4ca1a47"
 
+toidentifier@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.1.tgz#3be34321a88a820ed1bd80dfaa33e479fbb8dd35"
+
 touch@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/touch/-/touch-1.0.0.tgz#449cbe2dbae5a8c8038e30d71fa0ff464947c4de"
@@ -3563,12 +3670,12 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
-type-is@~1.6.15:
-  version "1.6.15"
-  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.15.tgz#cab10fb4909e441c82842eafe1ad646c81804410"
+type-is@~1.6.18:
+  version "1.6.18"
+  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.18.tgz#4e552cd05df09467dcbc4ef739de89f2cf37c131"
   dependencies:
     media-typer "0.3.0"
-    mime-types "~2.1.15"
+    mime-types "~2.1.24"
 
 typedarray@^0.0.6:
   version "0.0.6"
@@ -3606,7 +3713,7 @@ universalify@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/universalify/-/universalify-0.1.0.tgz#9eb1c4651debcc670cc94f1a75762332bb967778"
 
-unpipe@~1.0.0:
+unpipe@1.0.0, unpipe@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
 
@@ -3640,6 +3747,10 @@ utils-merge@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.0.tgz#0294fb922bb9375153541c4f7096231f287c8af8"
 
+utils-merge@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
+
 uuid@^2.0.1:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-2.0.3.tgz#67e2e863797215530dff318e5bf9dcebfd47b21a"
@@ -3661,9 +3772,9 @@ validate-npm-package-license@^3.0.1:
     spdx-correct "~1.0.0"
     spdx-expression-parse "~1.0.0"
 
-vary@~1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.1.tgz#67535ebb694c1d52257457984665323f587e8d37"
+vary@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
 
 verror@1.3.6:
   version "1.3.6"