phpcb 0.5.2

• Now supported PHP versions: 7.4, 8.0 and 8.1
• Removed custom autoloader, using PSR-4 instead.
• Tweaked rendering templates a bit.
• Added some tests + Github Actions test workflow.
• Added tests.sh and phpstan.sh dev helpers.

Full Changelog: 0.4...0.5

phpcb 0.4

Updates and fixes.

- ChaoticEngine rewritten and refactored to have results more stable.
- "Different results" detection implemented to ChaoticEngine,
  for users to be more sure that benchmarked closures perform exactly
  the same thing.
- Units: "ms" labeling fixed to "seconds".
- Fixer CRLF to LF line endings in files.