Migration to graphql-core-v3 (#36)

* feat: server-core compatible with graphql-core-v3

- Bump dependencies
- Refactor code to use f-strings format (3.6+)
- Rename public data structures

BREAKING CHANGE:
- Requires graphql-core-v3
- Drop support for Python 2 and below 3.6
- Remove executor check as graphql-core-v3 does not have SyncExecutor

* chore: drop unsupported py versions on tox and travis

* tests: apply minor fixes to older tests

* chore: apply black formatting

* chore: fix flake8 issues

* chore: remove promise package

* tests: achieve 100% coverage

* chore: apply compatible isort-black options

* chore: solve dev tools issues

* chore: remove pypy3 from tox envlist

* chore: remove pypy3 from travis

* tests: re-add helper tests

* chore: pin graphql-core to 3.1.0

* refactor: use graphql and graphql-sync functions

* tests: remove Promise and use async await iterator

* refactor: remove pytest-asyncio

* chore: set graphql-core dependency semver

Co-Authored-By: Jonathan Kim <jkimbo@gmail.com>

Co-authored-by: Jonathan Kim <jkimbo@gmail.com>

Author: KingDarBoja

.travis.yml

@@ -1,17 +1,13 @@
 language: python
 sudo: false
 python:
-  - 2.7
-  - 3.5
   - 3.6
   - 3.7
   - 3.8
   - 3.9-dev
-  - pypy
-  - pypy3
 matrix:
   include:
-    - python: 3.6
+    - python: 3.7
       env: TOXENV=flake8,black,import-order,mypy,manifest
 cache: pip
 install: pip install tox-travis codecov

README.md

@@ -35,6 +35,8 @@ The `graphql_server` package provides these public helper functions:
  * `json_encode`
  * `json_encode_pretty`
 
+**NOTE:** the `json_encode_pretty` is kept as backward compatibility change as it uses `json_encode` with `pretty` parameter set to `True`.
+
 All functions in the package are annotated with type hints and docstrings,
 and you can build HTML documentation from these using `bin/build_docs`.