Follow-ups to #328

[achimnol]

• #351
  • @webknjaz and I just created a new readthedocs project under aio-libs.
• Add twine check --strict to the build_sdist job
• #355
• #354
  • #358
• #350
  • #359
  • In the future, we will fully migrate to pre-commit.ci
• #353

[achimnol]

@webknjaz Please join to the rtd project and resync the webhook!

[webknjaz]

@achimnol I got the access to the original RTD from @jettify and just invited you over to https://readthedocs.org/projects/aiomonitor. I've reconfigured the DNS to point to it as well and recovered the GitHub integration. I'm going to disable the aiomonitor-ng integration now.

[webknjaz]

@achimnol one more thing missing from the CI seems to be running sphinx in strict mode. Do you have it on your list somewhere?