Fix url typo in composer.json
Add new Twig PadStringExtension
Add check to ensure second argument is an integer
Update docblock comment
Correct error in namespace declaration
Fix issues in filter class
Update README.md
Add extension to services.yml
Add documentation for extension
Add extension to DI configuration
Add method to check that padCharacter is not empty or null
Add unit tests for padStringFilter extension;
Add closing apostrophe to example calls in Usage section
Add explanatory text to provideForException dataProvider array (as array keys) to clarify why data is invalid
Add check for existance of mb_strlen function before using it in PadStringExtension function