Remove renovate config from docs/package.json (apollographql#248)

* Remove renovate config from docs/package.json

* Add apollo-docs preset to renovate.json

Author: rarkins

docs/package.json

@@ -20,10 +20,5 @@
     "build": "chexo apollo-hexo-config -- generate",
     "clean": "hexo clean",
     "test": "npm run clean; npm run build"
-  },
-  "renovate": {
-    "extends": [
-      "apollo-docs"
-    ]
   }
 }

renovate.json

@@ -1,3 +1,6 @@
 {
-  "packageFiles": ["docs/package.json"]
+  "packageFiles": ["docs/package.json"],
+  "extends": [
+    "apollo-docs"
+  ]
 }