chore(deps): update dependency @types/graphql to v0.12.1

Author: renovate-bot

package.json

@@ -21,7 +21,7 @@
     "graphql-tools": "2.18.0"
   },
   "devDependencies": {
-    "@types/graphql": "0.11.8",
+    "@types/graphql": "0.12.1",
     "@types/node": "9.3.0",
     "typescript": "2.6.2"
   },

yarn.lock

@@ -2,9 +2,9 @@
 # yarn lockfile v1
 
 
-"@types/graphql@0.11.8":
-  version "0.11.8"
-  resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.11.8.tgz#53ff3604e99db810dd43347f19fcd1c59725a7bb"
+"@types/graphql@0.12.1":
+  version "0.12.1"
+  resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.12.1.tgz#2c2f9a0da3cd23ee1ce7a6e6c9135ceeb9131c05"
 
 "@types/[email protected]":
   version "9.3.0"