build(deps): update click requirement from >=8.3.1 to >=8.4.2 - #186

src/diffannotator/annotate.py:416:24: UP045 Use `X | None` for type annotations help: Convert to `X | None`

src/diffannotator/annotate.py:415:29: UP007 Use `X | Y` for type annotations help: Convert to `X | Y`

src/diffannotator/annotate.py:384:9: SIM114 Combine `if` branches using logical `or` operator help: Combine `if` branches

src/diffannotator/annotate.py:355:16: C419 Unnecessary list comprehension help: Remove unnecessary comprehension

src/diffannotator/annotate.py:92:14: UP008 Use `super()` instead of `super(__class__, self)` help: Remove `super()` parameters

src/diffannotator/annotate.py:73:5: I001 Import block is un-sorted or un-formatted help: Organize imports

src/diffannotator/annotate.py:54:1: I001 Import block is un-sorted or un-formatted help: Organize imports

src/diffannotator/annotate.py:52:27: F401 `_typeshed.SupportsWrite` imported but unused help: Remove unused import: `_typeshed.SupportsWrite`

src/diffannotator/annotate.py:36:1: I001 Import block is un-sorted or un-formatted help: Organize imports

src/diffannotator/annotate.py:2:1: UP009 UTF-8 encoding declaration is unnecessary help: Remove unnecessary coding comment

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache/restore@v4, actions/cache/save@v4, actions/checkout@v4, actions/setup-python@v5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/