Release 1.9.0

[rmosolgo]

This is a checklist and tracking issue for the next minor version, 1.9.0

1.9-dev build status:

• GraphQL::Execution::Interpreter, a new runtime
  • Implement it: Interpreter #1394
  • Implement an analyzer API without irep_nodes: AST analyzers #1841
  • Cash in on the new interpreter being AST-only: don't run Rewrite for it. Hook up AST analyzers instead. Use new analysis engine when using Interpreter #1918 Skip rewrite when interpreter is enabled #2005
  • What to do with Authorization analyzer, can we leave it behind? Yes, we're gonna leave it behind.
  • Profile it Low hanging fruit in interpreter  #1886
  • Try it in our app
  • Document incompatibilities & migration strategies http://rmosolgo.github.io/blog/2019/01/29/a-new-runtime-in-graphql-ruby-1-dot-9/
  • Implement Lookahead Add a basic lookahead object #1894, Add GraphQL::Execution::Lookahead#selections #1907
  • Rethink how Subscription root fields are handled Class-based subscription fields #1930
  • Reimplement GraphQL Backtrace for interpreter Stashed some things in context Put runtime info in mutable context, too #1989
  • Support custom directives
    • Add class-based directives for interpreter #2055
    • Docs ed20cda
• Field extensions
  • Document breaking change to custom connections: their args input is now a symbol-keyed hash, not a GraphQL::Query::Arguments instance
• AST Changes, tracked at: AST improvements #1657
  • graphql-libgraphql-parser is broken, not sure what to do there: GraphQL 1.9 support graphql-libgraphqlparser-ruby#30
• Make bubble_errors false the default Schema configuration Error Bubbling #2013 Make error_bubbling=false the schema default #2069
• Make static validation errors extensions optional I'm going to leave it as-is for now, we can do this if needed.
• Revisit experimental: true in docs and remove it where appropriate
• Rethink perf of visitor API (Reduce arrays when we have throw-away return values #2070)
• Make graphql-batch not-broken (graphql-ruby 1.9 interpreter support Shopify/graphql-batch#93)

[rmosolgo]

It's not perfect but it's good enough: https://rubygems.org/gems/graphql/versions/1.9.0