Use TS 3.1.4 for building VS Code

package.json

@@ -125,7 +125,7 @@
     "source-map": "^0.4.4",
     "ts-loader": "^4.4.2",
     "tslint": "^5.9.1",
-    "typescript": "3.1.3",
+    "typescript": "3.1.4",
     "typescript-formatter": "7.1.0",
     "uglify-es": "^3.0.18",
     "underscore": "^1.8.2",

yarn.lock

@@ -8813,10 +8813,10 @@ typescript-formatter@7.1.0:
     commandpost "^1.0.0"
     editorconfig "^0.15.0"
 
-typescript@3.1.3:
-  version "3.1.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.3.tgz#01b70247a6d3c2467f70c45795ef5ea18ce191d5"
-  integrity sha512-+81MUSyX+BaSo+u2RbozuQk/UWx6hfG0a5gHu4ANEM4sU96XbuIyAB+rWBW1u70c6a5QuZfuYICn3s2UjuHUpA==
+typescript@3.1.4:
+  version "3.1.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.4.tgz#c74ef7b3c2da65beff548b903022cb8c3cd997ed"
+  integrity sha512-JZHJtA6ZL15+Q3Dqkbh8iCUmvxD3iJ7ujXS+fVkKnwIVAdHc5BJTDNM0aTrnr2luKulFjU7W+SRhDZvi66Ru7Q==
 
 typescript@^2.6.2:
   version "2.6.2"