Relative values in path commands

Hi 👋
First of all thanks for an awesome library. Really like it so far!

I wonder if there are any plans on implementing functionality to work with relative values as well as absolute? Support both uppercase and lowercase of the canvas path commands, that is.

Thanks
BR

Start by locating the path-command handling for the existing uppercase commands and inspect how absolute values are interpreted. Implement support for lowercase relative commands while preserving current behavior for uppercase commands, then run the existing test suite or path-related tests to verify both forms.

Written by the indexing model from the issue text.