☂️GraphQL-core v3

We will shortly be publishing [GraphQL-core-next](https://github.com/graphql-python/graphql-core-next) as v3 of GraphQL-core. There are breaking changes as part of this release and so this issue is to track all the tasks needed to get the ecosystem ready for the upgrade.

# Publish Graphql-core v3

* [x] Make graphql-relay-py next branch compatible with core-next
* [x] Make graphene next branch compatible with core-next
* [x] Create [v2 of graphql-relay-py](https://github.com/graphql-python/graphql-relay-py/pull/21) (compatible with core v2) on PyPI
* [x] Bring graphql-core-next up to date with GraphQL.js 14.4
* [x] Close open issues of graphql-core-next as far as possible
* [x] Setup graphql-core-next repo to publish as graphql-core: https://github.com/graphql-python/graphql-core-next/pull/40
* [x] Publish v2 of graphql-relay-py on PyPI (needs maintainer rights from Syrus)
* [x] Bring graphql-relay-py [next](https://github.com/graphql-python/graphql-relay-py/tree/next) branch up-to-date with graphql-relay-js 0.6 and add type hints
* [x] Make graphql-relay-py [next](https://github.com/graphql-python/graphene/tree/next/feature/core-next) branch the new master, move old master to legacy branch
* [x] Publish v3.0.0.a0 of graphql-relay-py on PyPI
* [x] Publish last version of graphql-core-next on PyPI
* [x] Create legacy branch of graphq-core-next from master
* [x] Change distribution name and version of GraphQL-core-next to GraphQL-core and set version to 3.0.0a0 in master branch
* [x] Publish GraphQL-core 3.0.0a0 on PyPI
* [x] Add notice to old graphql-core repository README that this is now deprecated
* [x] Make sure automatic deployment of GraphQL-core 3 on new tags works
* [x] Publish v3.0.0.b0 of graphql-relay-py and graphql-core
* [x] Publish v3.0.0 final of graphql-relay-py and graphql-core

# Pin dependant packages (not blocking)

* [x] [Graphene](https://github.com/graphql-python/graphene)
* [x] [GraphQL-server-core](https://github.com/graphql-python/graphql-server-core)
* [x] [GraphQL WS](https://github.com/graphql-python/graphql-ws)
* [x] [GraphQL-relay](https://github.com/graphql-python/graphql-relay-py) https://github.com/graphql-python/graphql-relay-py/pull/20
- [x] Master up to date
- [x] New release published
* [x] [GQL](https://github.com/graphql-python/gql) https://github.com/graphql-python/gql/pull/47
* [ ] [aiohttp-graphql](https://github.com/graphql-python/aiohttp-graphql) https://github.com/graphql-python/aiohttp-graphql/pull/11
- [x] Master up to date
- [ ] New release published
* [ ] [flask-graphql](https://github.com/graphql-python/flask-graphql) https://github.com/graphql-python/flask-graphql/pull/60
- [x] Master up to date
- [ ] New release published
* [ ] [sanic-graphql](https://github.com/graphql-python/sanic-graphql) https://github.com/graphql-python/sanic-graphql/pull/17
- [ ] Master up to date
- [ ] New release published
* [ ] [webob-graphql](https://github.com/graphql-python/webob-graphql) https://github.com/graphql-python/webob-graphql/pull/8
- [ ] Master up to date
- [ ] New release published
* [x] [dagit](https://github.com/dagster-io/dagster/blob/master/python_modules/dagit/setup.py) https://github.com/dagster-io/dagster/pull/1549

# Clean-up (not blocking)

* [ ] Make gql-next work with core v3.0.0
* [ ] Rename gql to gql-legacy and gql-next to gql, or merge gql-next into gql
* [ ] Rename graphql-core to graphql-core-legacy and graphql-core-next to graphql-core, or merge graphql-core-next into graphql-core, see #241

Comienza con los elementos de la checklist que no están marcados para aiohttp-graphql, flask-graphql, sanic-graphql, webob-graphql, gql y las tareas de renombrado del repositorio; las pull requests externas enlazadas proporcionan el contexto actual. Se considera terminado confirmar las versiones restantes de los paquetes y el trabajo de limpieza, pero esta incidencia de seguimiento no tiene un único archivo, prueba ni punto de entrada desde el que comenzar.

Escrito por el modelo de indexación a partir del texto del issue.