Further expand acceptable graphql peerDependencies range to include 0.12.x.

This further expands upon @patdmc's expansion of the `graphql` peer dependency to also include the `0.12.x` versions as well, thus matching precisely with that of `apollo-server-core`: https://github.com/apollographql/apollo-server/blob/17257a2f097e3e84892426c1e78dc819e67117ad/packages/apollo-server-core/package.json#L48-L50

Since this package is depended on by `apollo-engine-reporting`, which is depended on by `apollo-server-core`, we should completely align the desired `graphql` version requirements until the time comes where we make the same reduction in the `graphql` peer dependency range within `apollo-server-core`:

While that time will come soon, it's not here yet.

Author: abernix

packages/apollo-graphql/package.json

@@ -14,7 +14,7 @@
     "lodash.sortby": "^4.7.0"
   },
   "peerDependencies": {
-    "graphql": "^0.13.0 || ^14.0.0"
+    "graphql": "^0.12.0 || ^0.13.0 || ^14.0.0"
   },
   "jest": {
     "preset": "ts-jest",