Merge pull request ozdemirburak#41 from jaulz/patch-2

fix: use float instead of int to avoid warnings ozdemirburak#2

Merge pull request ozdemirburak#40 from jaulz/patch-1

fix: use float instead of int to avoid warnings

added PHP 7.3, 7.4 tests back to workflow

Remove PHP 7 support, will only support PHP 8. Added type hinting and…

… return type declarations. Made BaseColor::back() and BaseColor::getColorModelName() public @rv1971. Use non-locale aware output for the alpha value @Jako. Updated .gitignore, and some code refactoring @kudashevs

added new Hexa class, v2.4.0

changed HSL to HSV conversion method, fixes issue ozdemirburak#27

added PHP 8.0 to supported versions

Added documentation for fadeIn and fadeOut

Remove PHP 7.1 support, allow more than two precision for alpha

Merge pull request ozdemirburak#17 from amnuts/full-css-color-names

Added full list of css colours.