v6.1.1

Fixed

• Removed Coveralls integration from the package: deleted Coveralls badge from README and removed php-coveralls/php-coveralls from dev dependencies.
• Removed obsolete .coveralls.yml config.

CI

• Updated GitHub Actions PHPUnit workflow dependency bootstrapping to avoid Composer 1 usage.
• Matrix now runs and passes on PHP 7.2, 7.3, 7.4, 8.0, 8.1, 8.2, and 8.3.
• Disabled matrix fail-fast to surface all version failures clearly.