Released version 0.5

Added

• Added changelog from @reedy.

Internal

• Cleaned readme - new organization from previous package from @grogy.
• Composer: marked package as replacing jakub-onderka/php-console-highlighter from @grogy.
• Composer: updated dependancies to use new php-parallel-lint organisation from @grogy.
• Travis: test against PHP 7.4 and nightly from @jrfnl.
• Fixed build script from @jrfnl.
• Added a .gitattributes file from @reedy.
• Updated installation command from @cafferata.