Mypy testing

Workflow runs for Mypy testing

• Rename package dir to expr_lang for PyPI release

  completed successfully:
  Mypy testing#10:Commitbc6091cpushedbyantonmedv
  v0.1.0

  May 15, 202636s
  More actions for workflow run 10

• Rename package dir to expr_lang for PyPI release

  completed successfully:
  Mypy testing#9:Commitbc6091cpushedbyantonmedv
  master

  May 15, 202632s
  More actions for workflow run 9

• Bump actions/checkout from 4 to 6

  failed:
  Mypy testing#8:Pull request#3openedbydependabot[bot]Bot
  dependabot/github_actions/actions/checkout-6

  Nov 24, 202522s
  More actions for workflow run 8

• Bump actions/checkout from 4 to 6

  failed:
  Mypy testing#7:Commit861fc5fpushedbydependabot[bot]Bot
  dependabot/github_actions/actions/checkout-6

  Nov 24, 202514s
  More actions for workflow run 7