Fix WordPress requirement check for unavailable plugin updates (#531)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: Pascal Birchler <pascalb@google.com>

Keep failed update output parseable for JSON and CSV (#529)

Co-authored-by: Pascal Birchler <pascalb@google.com>

Fix Plugin name with HTML entities test (#526)

Harden theme update test (#525)

Harden `check-update` test (#520)

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Tests: improve Windows compatibility (#518)

PHPStan fix

Merge pull request #506 from wp-cli/copilot/fix-1570774-87201472-127c…

…d70a-3a52-471a-9dc4-fc27ebad98fc

Merge pull request #465 from wp-cli/fix/tests

Fix tests for Hello Dolly

Merge pull request #445 from itsmekopila/fix/429