Update to use #to_type_signature instead of #to_graphql

[RobinDaugherty]

graphql 1.13.1 deprecated #to_graphql, making this change necessary.

#to_type_signature seems to have been added in ruby-graphql 1.8.3 so this shouldn't be a breaking change for most users.

[BoboFraggins]

This fixes #42 for us.

[RobinDaugherty]

@khamusa can you please merge and release this? Please let me know if I can help.

[Sh1ken]

Is this the only change holding this gem back from upgrading to GraphQL-Ruby 2.0?

[MrJoy]

The version range for graphql in the gemspec also needs to be updated, at the very least.

[djberg96]

Is this the only change holding this gem back from upgrading to GraphQL-Ruby 2.0?

Some of the specs will need to be updated as well.

Edit: and this line doesn't work with 2.x: https://github.com/khamusa/rspec-graphql_matchers/blob/master/lib/rspec/graphql_matchers/types_helper.rb#L9

[liveh2o]

Just starting a new gig, and seeing these deprecation warnings. What's the status on this MR? I'd love to help if I can.

[tdgs]

Any news on this one?

[tdgs]

@khamusa thanks for writing this gem! Are you still actively maintaining this?

[phikes]

I am trying to get a hold of @khamusa via other channels to take over maintaining of this gem.

[khamusa]

Thanks for all the contributions, and I apologize for disappearing.

I have merged the PR, fixed the tests, did some extra cleanup, and updated the gemspec versions after testing against all minor versions. Version 1.4.0 has been published. I'll now investigate what's needed to achieve compatibility with graphql-ruby 2+

[phikes]

Amazing, welcome back und thanks for putting in the work :)