Consider cancelled tasks as checked
Fixes #84 (partially, only adds cancelled tasks and it is not customizable).
I tried making it customizable via settings, but I think I'm not following the convention on the different classes, so I think it's better to just ship this PR first and address customisation separately.
Also hope for this feature!
@uphy any thoughts?
I'm sorry for the delay in reviewing.
I think this is a very good implementation that is both necessary and sufficient. Please let me test this more later.
related: #208
@8bitbuddhist Though this implementation will not ignore the IN_PROGRESS status (- [/] in-progress task), but canceled task will be ignored.