Features
- Added `cyclic_xor_string_unsafe` as the part of the *unsafe* API.
- Added `xor_in_place`.
- Added `cyclic_xor_in_place`.
- Added `cyclic_xor_in_place_unsafe` as the part of the *unsafe* API.
Changes
- Bumped the minimal Python version to `3.7`.
- Renamed `xor_static -> xor`.
- Renamed `xor_cyclic -> cyclic_xor`.
- Renamed `xor_cyclic_unsafe -> cyclic_xor_unsafe`.
- Renamed `xor_static_str -> xor_string`.
- Renamed `xor_cyclic_str -> cyclic_xor_string`.
This function now expects `key` of type `str` instead of `bytes`.