Multiple small fixes

What's Changed

• Fixing default parameter for linting all files by @nmenardg-keeper in #3
• Added an example actions.yml file by @nmenardg-keeper in #4
• Fix mypy's missing stubs error by @nmenardg-keeper in #5

New Contributors

• @nmenardg-keeper made their first contribution in #3

Full Changelog: v2...v3

Mypy fix

As title suggests, mypy regex has been updated.

Final v.2 relaease

Changes

• new architecture relying on conda environments instead of docker images which is more flexible
• added new problem matchers
• fixed existing matchers
• repo cleanup
• test with more mistakes
• fix problem matchers not being found
• fix file wildcard patterns
• fix incorrectly assigned extra lintner options
• Better and less error prone wildcard handling in arguments