Release version 2.2.0. From this version on, you can't use Python 3.6 because f-string is used in the code. Please upgrade your Python to at least 3.6 when you encounter some error about syntax.
|PR|Change Summary|Label|Author|
|:---|:---|:---|:---:|
|[223](https://github.com/kyuridenamida/atcoder-tools/pull/223)|Fix no inversion of save_no_session_cache in submit.py|![#fc2929](https://via.placeholder.com/15/fc2929/000000?text=+) **bug**|[dnek](https://github.com/dnek)|
|[222](https://github.com/kyuridenamida/atcoder-tools/pull/222)|New option to skip preparing existing problem directories|![#84b6eb](https://via.placeholder.com/15/84b6eb/000000?text=+) **enhancement**|[dnek](https://github.com/dnek)|