Offically support PHP 8.2

[gudmdharalds]

All fixes for PHP 8.2 are now complete. Make PHP 8.2 officially supported.

TODO:

• Update README.md to reflect support.
• [N/A] Add/update tests -- unit/integrated/E2E (if needed)
  • [N/A] Ensure only one function/functionality is tested per test file.
• [N/A] Add to, or update, Scan run detail report as applicable
• Check status of automated tests
• [N/A] Ensure PHPDoc comments are up to date for functions added or altered
• Assign appropriate priority and type of change labels.
• Changelog entry (for VIP) [ Add changelog for version 1.3.9 #377 ]

[wpcomvip-vipgoci-bot]

Auto-approved pull request #379 as it contains only auto-approvable files -- non-functional changes to PHP files or file-types that are auto-approvable (css, csv, eot, gif, gz, ico, ini, jpeg, jpg, json, less, map, md, mdown, mo, mp4, otf, pcss, pdf, po, pot, png, sass, scss, styl, ttf, txt, woff, woff2, yml).