Drop support for tox 2; commitlint; ansible-lint-collection

What's Changed

• Drop support for tox 2 - you must use tox 3 or later now
• ci: Add commitlint environment by @spetrosi in #115
• use allowlist by @richm in #124
• ansible lint collection by @richm in #125
• update ansible-lint container to 0.18.0 by @richm in #126
• bump version to 3.0.0 by @richm in #127

Full Changelog: 2.15.0...3.0.0