Flask-graphql

Changelog
* Added official support for Python 3.7 https://github.com/graphql-python/flask-graphql/commit/64bab0799666a3a0a49b55637ef5c96d731003ec
* Use stable version of `graphql-server-core` (`1.1`) https://github.com/graphql-python/flask-graphql/commit/3d607a0bd96321840b1960126900be46a709ba89

Changelog
* Added support for pluggable `backend`s 068ee717f97f7b156dda24645c5a2616dadc2121
* Updated GraphiQL 298d89009b5c517ddc34e2bf53291c743225ca97
* Fixed docs 23fb85c6c8067c557b934c5f1d5f09eee80fa64e

Changelog
- Don't send referrer to jsdelivr f7a5b3644aa290065c0bdb9ceac44e71d7f7acd5
- Refactored GraphiQL rendering 5fb5cd66bb817900da84c54640802500f7812a1e

Changelog
- Added support for batch GraphQL queries 21
- Prettify result of query when using GraphiQL b26ee010954b73acd2e18e05c74508f1699d7e1f
- Add context as attribute to the view 31de8ccf9af4236f0b8faeaa5d7056e5809f88e1
- Added GraphiQL template injection 2128bf54d03d833f30553c60204f80d9e807b83d

Extra
- Improved testing (context and pretty extra tests)