Bug Fixes
- Char set validators
([154](https://github.com/ocadotechnology/codeforlife-package-python/pull/154),
[`ed7b3f7`](https://github.com/ocadotechnology/codeforlife-package-python/commit/ed7b3f7236cc0064db7bfa602cab68584c10ba1e))
* add validators
* validators
* read only
* delete unnecessary comment
* clean up
* delete codecov.yml
* support unicode
* fix regex validations
* unicode tests
* fix linting error
* fix tests
* fix linting errors
* test ascii does not include unicode
* feedback
* class_access_code_validators
* regex validator test case