chore(deps): update dependency typescript to v2.7.1

Author: renovate-bot

package.json

@@ -23,7 +23,7 @@
   "devDependencies": {
     "@types/graphql": "0.12.3",
     "@types/node": "9.4.0",
-    "typescript": "2.6.2"
+    "typescript": "2.7.1"
   },
   "repository": {
     "type": "git",

yarn.lock

@@ -113,9 +113,9 @@ node-fetch@1.7.3:
     encoding "^0.1.11"
     is-stream "^1.0.1"
 
-typescript@2.6.2:
-  version "2.6.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.6.2.tgz#3c5b6fd7f6de0914269027f03c0946758f7673a4"
+typescript@2.7.1:
+  version "2.7.1"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.1.tgz#bb3682c2c791ac90e7c6210b26478a8da085c359"
 
 uuid@^3.1.0:
   version "3.1.0"