fix(deps): update dependency graphql-playground-middleware-express to v1.6.1 (#253)

Author: renovate[bot]

package.json

@@ -47,7 +47,7 @@
     "express": "^4.16.3",
     "graphql": "^0.11.0 || ^0.12.0 || ^0.13.0",
     "graphql-import": "^0.5.0",
-    "graphql-playground-middleware-express": "1.6.0",
+    "graphql-playground-middleware-express": "1.6.1",
     "graphql-playground-middleware-lambda": "1.5.0",
     "graphql-subscriptions": "^0.5.8",
     "graphql-tools": "^2.23.1",

yarn.lock

@@ -563,9 +563,9 @@ graphql-playground-html@1.5.5:
   dependencies:
     graphql-config "2.0.0"
 
-graphql-playground-middleware-express@1.6.0:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/graphql-playground-middleware-express/-/graphql-playground-middleware-express-1.6.0.tgz#2a9da3a397ea63573c0186cb7b61f300d45794a0"
+graphql-playground-middleware-express@1.6.1:
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/graphql-playground-middleware-express/-/graphql-playground-middleware-express-1.6.1.tgz#d6287d124a1c55845a52a7d727c371da99cdf0b0"
   dependencies:
     graphql-playground-html "1.5.5"