Support new React Apollo API

[ardatan]

Related #2112
I think we should wait for stable release.
@apollo/* libraries can be used with the version;
- @graphql-codegen/typescript-react-apollo => 1.4.1-alpha-3b1e744b.8+3b1e744b

[nezdemkovski]

@apollo/* libraries have been bumped to v.3 🎊

[SimenB]

Did this drop support for react-apollo-hooks entirely? Unchanged config on our side generates completely different imports, so regardless if I can change config to match old output, this (or some other change to the react apollo plugin I'm unable to dig up) was a breaking change in 1.5.0

[ardatan]

You are right, it is a breaking change and we are sorry about that.
With a bit more context, the maintainer of react-apollo-hooks said that his package would be deprecated in favor of the stable release of @apollo/react-hooks, so we’ve moved to the new package after the stable release of it.
The name and the signature of generated hooks should be almost same in both packages, so the only thing changed is the package name.
But if you want to go with the old package, you can use older version for react-apollo plugin of codegen.
I understand it is still a breaking change but we believe it is a relatively small and manageable one