chore(deps): update dependency typescript to v2.8.3

Author: renovate-bot

package.json

@@ -23,7 +23,7 @@
   "devDependencies": {
     "@types/graphql": "0.13.0",
     "@types/node": "9.6.6",
-    "typescript": "2.8.1"
+    "typescript": "2.8.3"
   },
   "repository": {
     "type": "git",

yarn.lock

@@ -95,9 +95,9 @@ object-path-immutable@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/object-path-immutable/-/object-path-immutable-1.0.1.tgz#3c424052be3c54ec82def03f1b11b0c6e085c7ff"
 
-typescript@2.8.1:
-  version "2.8.1"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.8.1.tgz#6160e4f8f195d5ba81d4876f9c0cc1fbc0820624"
+typescript@2.8.3:
+  version "2.8.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.8.3.tgz#5d817f9b6f31bb871835f4edf0089f21abe6c170"
 
 uuid@^3.1.0:
   version "3.1.0"