Methscan

This is a minor release that adds three tiny features:

1. `methscan filter` can now filter in place, i.e. overwrite its own input directory with a filtered version of itself
2. `methscan scan` now aborts properly when no VMRs above the `--min-cells` threshold are found
3. Added a command to show citation info and a link to our paper.

This is the initial release of MethSCAn upon acceptance of our paper. The main difference is that we renamed the package from `scbs` to `MethSCAn`.

For earlier releases and changelogs, check the old [repository](https://github.com/LKremer/scbs) and its [release page](https://github.com/LKremer/scbs/releases).