GraphiQL 2.0.0 beta Roadmap (monaco, redesign and plugin API!)

[acao]

Though the meta issue #983 summarizes all work that the new GraphiQL depends on, this issue is a roadmap for features that are GraphiQL only.

0.x.y

• e2e harness with Cypress and a starting suite
• move from browserify to webpack build, improve webpack supprot with example configs
• increase unit test coverage
• numerous bugfixes
• backport a more IE compatible release, perhaps?
• e2e harness with Cypress and a nice suite to start with

2.0.0-beta

• chore: Full support i18n (i18next) excluding localization services #977 - full i18next!
• fix(accessibility): improve accessibility of all components #967 - full accessibility!
• feat: deprecate support for 15, support react 16 features #1107 - React 16, drop support for React 15
• feat: upgrade to graphql@15.0.0 for #1191 #1204 - support GraphQL 15
• interfaces implementing interfaces
• remote scalar support for completion
• feat: schema provider and operation session context using context/useReducer #1359 - migrate to using React context, or another state management strategy
• React 16! Use deprecated class methods for now
• Get smarter with a core react context, provide useGraphQLContext hook, maybe with parsing and visitors/ast?
• Expose events interface to use internally and via plugins via useReducer, etc?
• Convert several smaller components to implement the hooks interface, use for existing functional components
• Begin with a 'plugins' array prop that renders Components that use context/reducer events and/or FCs that use hooks interface
• Adopt new monaco language mode, stabilize
• keymap/command customization to allow previous (sublime based) keymap, or new vscode-oriented keymap, or per-shortcut customization. Default keymap should have parity with last 0.x.y release?
• mostly stable API
• render middlewares
• full monaco support