v3.0.0rc0

New features

• Supports AWS AppSync (#239)
• It is now possible to get the full execution result to receive the extensions field (#257)
• Add --print-schema to gql-cli to easily download a schema from a backend (#258)
• DSL meta fields implementation (#259)
• Enable mypy to discover type hints as specified in PEP 561 (#275)
• gql-cli add --transport argument (#281)

Fixes

• Invert the order of proposed subprotocols apollo and graphql-ws (#265):
  This was needed because some backends were incorrectly sending the first
  supported protocol in the list without verification
• Fix aiohttp wait for closed ssl connections (#153):
  Should fix error "RuntimeError: Event loop is closed" when using gql-cli under windows with a https backend
• Add skip and include directive in introspection schema (#279)

Other

• DSL Refactor select (#261)
• Supporting Python 3.10 without warnings (#264)
• Update websockets to 10 for Python versions >= 3.6
• Expand aiohttp version range (#274)
• Documentation Adding error handling doc (#266)
• gql-cli add signal handlers to catch ctrl-c and close cleanly (#276)
• refactor the websockets transport with WebsocketsTransportBase (#239)

Breaking changes

• Remove the obsolete type_def argument of Client (#262)