Is your feature request related to a problem? Please describe.
This is not a problem really but just a suggestion to include an option for streak counting. Idea is a feature that could be enabled optionally and would count streak days only from week - labor days and not weekends. That "healthy" option would allow the streak to be continued in actual work days and not get lost just cause one didn't contribute in their off days.

Describe the solution you'd like
Solution would be provided with a kind of flag, e.g 'healthy=True' and of course this would be reflected on the image generated to be declared so not to be confused with the ones that don't use the filter.