chore(deps): update dependency @types/graphql to v0.13.4

Author: renovate-bot

package.json

@@ -24,7 +24,7 @@
     "apollo-upload-server": "^5.0.0"
   },
   "devDependencies": {
-    "@types/graphql": "0.13.3",
+    "@types/graphql": "0.13.4",
     "ava": "0.25.0",
     "graphql": "0.13.2",
     "graphql-middleware": "1.4.2",

yarn.lock

@@ -158,9 +158,9 @@
   version "0.12.6"
   resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.12.6.tgz#3d619198585fcabe5f4e1adfb5cf5f3388c66c13"
 
-"@types/graphql@0.13.3":
-  version "0.13.3"
-  resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.13.3.tgz#23af65796d341f93ef5b485138bd52c67786452d"
+"@types/graphql@0.13.4":
+  version "0.13.4"
+  resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.13.4.tgz#55ae9c29f0fd6b85ee536f5c72b4769d5c5e06b1"
 
 "@types/node@^9.4.6":
   version "9.6.21"