changed graphql-typings dependency from peer to standard

[DxCx]

as discuessed in apollostack/meteor-starter-kit#30
@helfer, do we need to update CHANGLOG for that? i wouldn't..

TODO:

• Update CHANGELOG.md with your change (include reference to issue & this PR)
• Make sure all of the significant new logic is covered by tests
• Rebase your changes on master so that they can be merged easily
• Make sure all tests and linter rules pass

[stubailo]

I think this merits a changelog entry because users are going to be aware of this change.

[helfer]

Merged, thanks!