chore(deps): update dependency graphql-yoga to v1.9.0

Author: renovate-bot

example/package.json

@@ -5,7 +5,7 @@
   },
   "dependencies": {
     "graphql-binding-github": "0.3.21",
-    "graphql-yoga": "1.8.5"
+    "graphql-yoga": "1.9.0"
   },
   "now": {
     "alias": "graphql-binding-github"

example/yarn.lock

@@ -491,6 +491,12 @@ graphql-import@^0.5.0:
   dependencies:
     lodash "^4.17.4"
 
+graphql-middleware@^1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/graphql-middleware/-/graphql-middleware-1.1.1.tgz#fb7ce5bf7f78431bb1265ea4ad4365b921960387"
+  dependencies:
+    graphql-tools "^2.23.1"
+
 graphql-playground-html@1.5.5:
   version "1.5.5"
   resolved "https://registry.yarnpkg.com/graphql-playground-html/-/graphql-playground-html-1.5.5.tgz#e2aca543eb66b435ead495b45244b2604d6b2d48"
@@ -541,9 +547,9 @@ graphql-tools@^2.23.1:
     iterall "^1.1.3"
     uuid "^3.1.0"
 
-graphql-yoga@1.8.5:
-  version "1.8.5"
-  resolved "https://registry.yarnpkg.com/graphql-yoga/-/graphql-yoga-1.8.5.tgz#e06c77fbfd6a186afeaf21baf9617bdf8636d502"
+graphql-yoga@1.9.0:
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/graphql-yoga/-/graphql-yoga-1.9.0.tgz#d6854be9e5b1225430d52f90b95e62404da57c8c"
   dependencies:
     "@types/cors" "^2.8.3"
     "@types/express" "^4.11.1"
@@ -558,6 +564,7 @@ graphql-yoga@1.8.5:
     express "^4.16.3"
     graphql "^0.11.0 || ^0.12.0 || ^0.13.0"
     graphql-import "^0.5.0"
+    graphql-middleware "^1.1.0"
     graphql-playground-middleware-express "1.6.1"
     graphql-playground-middleware-lambda "1.5.0"
     graphql-subscriptions "^0.5.8"