v1.1.0

1.) added: full test coverage
2.) added: code formatting

PackageEnvLoaderContract:
1.) removed: not needed docblock

PackageEnvLoader:
1.) removed: not needed docblock
2.) added: return type mixed

ExampleIntegration:
1.) added: code format

composer.json:
1.) removed: support for php 7.4
2.) added: support for php 8.x
3.) added: version bump
4.) added: testing scripts