Magql

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Released 2021-07-22

- Add static typing annotations.
- Add validation helpers.

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Released 2021-05-28

- Add `EXISTS` and `DOESNOTEXIST` string operators for filtering.
- Change ids to use ID graphql scalar type.

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Released 2020-04-06

- Return `None`, not error, in single queries with no row found.

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Released 2020-04-02

- Add pagination support.
- Add `AuthorizationError` and remove `PermissionsError`.
- Add `ListPayload` type for list return types.
- Remove `Resolver` superclass on non-CRUD resolvers.
- Fix bug where queries returned none caused by upgrading return type.
- Remove unused marshmallow-sqlalchemy dependency.
- Update and set minimum version for some dependencies.
- `singledispatch` functions raise `TypeError` if no handler is registered for
a type.
- `Manager.manager_map` uses table names instead of tables as keys.

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Released 2020-02-13

- Initial public version.