Update dependency graphql-yoga to v1.14.8

Author: renovate-bot

basic/server/package.json

@@ -6,7 +6,7 @@
   },
   "dependencies": {
     "graphcool-binding": "1.3.5",
-    "graphql-yoga": "1.14.7"
+    "graphql-yoga": "1.14.8"
   },
   "devDependencies": {
     "now": "8.5.4"

basic/server/yarn.lock

@@ -593,9 +593,9 @@ graphql-tools@^3.0.2:
     iterall "^1.1.3"
     uuid "^3.1.0"
 
-graphql-yoga@1.14.7:
-  version "1.14.7"
-  resolved "https://registry.yarnpkg.com/graphql-yoga/-/graphql-yoga-1.14.7.tgz#0ce1f59b131d196438711d7100d9b03c0fb3a1d7"
+graphql-yoga@1.14.8:
+  version "1.14.8"
+  resolved "https://registry.yarnpkg.com/graphql-yoga/-/graphql-yoga-1.14.8.tgz#0ef9630e309c05014ee6d2afcdfe889e7edea9f6"
   dependencies:
     "@types/cors" "^2.8.4"
     "@types/express" "^4.11.1"