Upgrade bluebird to 3.7.1 (from 3.7.0)

Author: bdukes

package.json

@@ -16,7 +16,7 @@
     "@khanacademy/tota11y": "0.2.0",
     "alpaca": "1.5.27",
     "blob.js": "1.0.1",
-    "bluebird": "3.7.0",
+    "bluebird": "3.7.1",
     "bootstrap": "4.3.1",
     "bootstrap-accessibility-plugin": "1.0.6",
     "bootstrap-datepicker": "1.9.0",

yarn.lock

@@ -524,10 +524,10 @@ blobjs@^1.1.1:
   resolved "https://registry.yarnpkg.com/blobjs/-/blobjs-1.1.1.tgz#544af6db887b1c62f45ea8e07ceb45c13b5995aa"
   integrity sha1-VEr224h7HGL0XqjgfOtFwTtZlao=
 
-bluebird@3.7.0:
-  version "3.7.0"
-  resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.0.tgz#56a6a886e03f6ae577cffedeb524f8f2450293cf"
-  integrity sha512-aBQ1FxIa7kSWCcmKHlcHFlT2jt6J/l4FzC7KcPELkOJOsPOb/bccdhmIrKDfXhwFrmc7vDoDrrepFvGqjyXGJg==
+bluebird@3.7.1:
+  version "3.7.1"
+  resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.1.tgz#df70e302b471d7473489acf26a93d63b53f874de"
+  integrity sha512-DdmyoGCleJnkbp3nkbxTLJ18rjDsE4yCggEwKNXkeV123sPNfOCYeDoeuOY+F2FrSjO1YXcTU+dsy96KMy+gcg==
 
 boolean@^0.2.0:
   version "0.2.0"