Chsu-schedule-api

What's Changed
* params `from_date` and `to_date` for the `TitleTimeTableType` are optional
* Change the `online` attribute type from int(0, 1) to bool in the `TimeTable` model
* "Models" package has been renamed to "types"
* Update `Methods` enum inherited type
* Add caching for `_get_id_by_title` method
* the `CHSUApi` methods can now be used synchronously

strftime fix in `TimeTableType`

What's Changed
* added `TitleTimeTableType` class which supports time table definition by the title of group / lecturer name
* The `from_date` and `to_date` attributes of the`TimeTableType` class attributes now support str type
* Added `CHSUApiLookupError` exception
* Api class refactor

Time table full class renamed
TTFull -> Full

Added unauthorized exception