Release v1.4.3

Mostly type improvements, validate against 3.15 on CI, update documentation, fixes and issue with indexable walker allclose.

What's Changed

• Fix building documentation with Python 3.14 by @cjwatson in #197
• Start branch for dev/1.4.3
  by @Erotemic in #195

New Contributors

• @cjwatson made their first contribution in #197

Full Changelog: v1.4.2...v1.4.3