Pin to apollo-graphql@0.1.0.

Until the work in apollographql/apollo-tooling#1027
is completed, this will ensure that we can publish this package with the
current setup, which I'd rather do for the first time _soon_ rather than
_whenever_.

Author: abernix

packages/apollo-server-plugin-operation-registry/package.json

@@ -11,7 +11,7 @@
     "node": ">=6"
   },
   "dependencies": {
-    "apollo-graphql": "^0.1.1",
+    "apollo-graphql": "0.1.0",
     "apollo-server-caching": "^0.3.1",
     "apollo-server-errors": "^2.2.0",
     "apollo-server-plugin-base": "^0.3.2",