style: Fixed version badge and added Github stars badge

chore: PHPDoc and Tests clean up

- Moved tests to proper namespace and folder
- Added composer autoloader to phpunit tests
- Improved PHPDoc to better reflect current state

fix: Has method could invoke array_key_exists on not array variable

Merge remote-tracking branch 'origin/master'

Merge remote-tracking branch 'origin/master'

Added another flag to check method and improved documentation

Added wrapper around array_filter

Added each method and updated README links

Clarified Find mode description and updated README links

Added find method