Tartiflette-asgi

Added

- GraphiQL configuration via the `GraphiQL` helper. Options: `path`, `default_query`, `default_headers`, `default_variables`, `template`.

Changed

- Internal refactoring that leverages more of Starlette's capabilities.
- Documentation improvements.

Added

- Support for `starlette>=0.12` (previously `>=0.12.0b3`).
- Tartiflette is now installed too when installing `tartiflette-asgi`.

Changed

- The default `path` is now `""` (previously `"/"`).
- The request is now accessible in the GraphQL context via `context["req"]` (previously `context["request"]`).
- If no error occurred, the `errors` field is not present in the response anymore (previously was `None`).

Fixed

- More robust URL matching on `TartifletteApp`.

Fixed

- Add missing `graphiql.html` package asset.

Added

Features:

- `TartifletteApp` ASGI application.
- Built-in GraphiQL client.

Project-related additions:

- Package setup.
- Changelog.
- Contributing guide.
- README and documentation.