Cstag

Implement `cstag.mask()` 7

+ maintenance release
+ change args of append(is_long) to long for cstag v0.5.1
+ add typehints
+ add python requirements >= 3.7

- add `cstag append` command
- upload to pypi and bioconda
- connect to zotero

- 3 implement `cstag.consensus()`