Bump apollo-cache-inmemory npm version to 1.3.0-beta.1.
Bump apollo-cache-inmemory npm version to 1.3.0-beta.1.

No meaningful apollo-cache-inmemory changes in this version. Just merging
in recent changes from master.

apollographql/apollo-client,apollostack/apollo-client,apollostack/apollo-client,apollostack/apollo-client,apollographql/apollo-client