Add PHP 8 support

 * Removed tests on PHP 7.1 and 7.2
 * Enable StyleCI (#2)
 * Delete composer.lock
 * Cleanup
 * Apply fixes from StyleCI
 * Drop old PHP and add more typing
 * Apply fixes from StyleCI
 * Restored PHP 7.3 support
 * Update composer.json
 * Update composer.json
 * Fixed typos in README
 * Closes #4
 * Apply fixes from StyleCI
 * Bumped phpstan version
 * Added support for `psr/log` 2 and 3
 * Upgraded phpstan
 * Fixes
 * Release 1.1.0
 * Upgrade static analyzer
 * Apply fixes from StyleCI
 * Cleanup tests (#6)
 * Made an assertion much more specific (#7)
 * PHP 8.1 support (#8)
 * Update LICENSE
 * Update CHANGELOG.md
 * Update CHANGELOG.md
 * Official support for PHP 8.2 (#9)
 * Release 1.3.0
 * Remove PHP 8.1 emulation on 8.2 CI (#10)
 * Dropped PHP 7.3 support and use PHPUnit 10
 * Update tests.yml
 * Make response header parsing more robust and improve handshake exception messages
 * Use `random_bytes` to generate handshake keys
 * Tweaked phpdoc and types
 * Update CHANGELOG.md
 * A...