Update dependency typescript to v2.8.4

Author: renovate-bot

basic/package.json

@@ -37,6 +37,6 @@
     "@angular/compiler-cli": "4.4.6",
     "codelyzer": "2.1.1",
     "tslint": "4.5.1",
-    "typescript": "2.8.3"
+    "typescript": "2.8.4"
   }
 }

basic/yarn.lock

@@ -5276,9 +5276,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@2.8.3:
-  version "2.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.8.3.tgz#5d817f9b6f31bb871835f4edf0089f21abe6c170"
+typescript@2.8.4:
+  version "2.8.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.8.4.tgz#0b1db68e6bdfb0b767fa2ab642136a35b059b199"
 
 typescript@~2.6.2:
   version "2.6.2"