Update dependency graphql-yoga to v1.13.1

Author: renovate-bot

basic/server/package.json

@@ -6,7 +6,7 @@
   },
   "dependencies": {
     "graphcool-binding": "1.3.5",
-    "graphql-yoga": "1.13.0"
+    "graphql-yoga": "1.13.1"
   },
   "devDependencies": {
     "now": "8.5.4"

basic/server/yarn.lock

@@ -583,9 +583,9 @@ graphql-tools@^2.23.1:
     iterall "^1.1.3"
     uuid "^3.1.0"
 
-graphql-yoga@1.13.0:
-  version "1.13.0"
-  resolved "https://registry.yarnpkg.com/graphql-yoga/-/graphql-yoga-1.13.0.tgz#b89061a5e1c147de290b1ada480b5276e5db880e"
+graphql-yoga@1.13.1:
+  version "1.13.1"
+  resolved "https://registry.yarnpkg.com/graphql-yoga/-/graphql-yoga-1.13.1.tgz#3e0ff7253726542ce419b37a7e24148ed6653a35"
   dependencies:
     "@types/cors" "^2.8.4"
     "@types/express" "^4.11.1"