chore(deps): update dependency @types/graphql to v0.13.1

Author: renovate-bot

package.json

@@ -21,7 +21,7 @@
     "graphql-tools": "2.21.0"
   },
   "devDependencies": {
-    "@types/graphql": "0.13.0",
+    "@types/graphql": "0.13.1",
     "@types/node": "10.0.6",
     "typescript": "2.8.3"
   },

yarn.lock

@@ -6,9 +6,9 @@
   version "0.12.6"
   resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.12.6.tgz#3d619198585fcabe5f4e1adfb5cf5f3388c66c13"
 
-"@types/graphql@0.13.0":
-  version "0.13.0"
-  resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.13.0.tgz#78a33a7f429a06a64714817d9130d578e0f35ecb"
+"@types/graphql@0.13.1":
+  version "0.13.1"
+  resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-0.13.1.tgz#7d39750355c9ecb921816d6f76c080405b5f6bea"
 
 "@types/node@10.0.6":
   version "10.0.6"