seperate config reading from the SaQC class

See merge request !305

regularlize -> deregularize -> drop intermediate workflow

# Conflicts:
#   requirements.txt

# Conflicts:
#   requirements.txt

Bump matplotlib from 3.4.2 to 3.4.3

See merge request !298

Bump numpy from 1.20.3 to 1.21.2

See merge request !300

Bump pytest from 6.2.4 to 6.2.5

See merge request !302

# Conflicts:
#   requirements.txt

Bump typing-extensions from 3.10.0.0 to 3.10.0.2

See merge request !304

Bumps [typing-extensions](https://github.com/python/typing) from 3.10.0.0 to 3.10.0.2.
- [Release notes](https://github.com/python/typing/releases)
- [Commits](https://github.com/python/typing/compare/3.10.0.0...3.10.0.2)

Bumps [scipy](https://github.com/scipy/scipy) from 1.6.3 to 1.7.1.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](https://github.com/scipy/scipy/compare/v1.6.3...v1.7.1)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.2.4 to 6.2.5.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.2.4...6.2.5)

Bumps [numpy](https://github.com/numpy/numpy) from 1.20.3 to 1.21.2.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst.txt)
- [Commits](https://github.com/numpy/numpy/compare/v1.20.3...v1.21.2)

Bumps [numba](https://github.com/numba/numba) from 0.53.1 to 0.54.0.
- [Release notes](https://github.com/numba/numba/releases)
- [Commits](https://github.com/numba/numba/compare/0.53.1...0.54.0)

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.4.2 to 3.4.3.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](https://github.com/matplotlib/matplotlib/compare/v3.4.2...v3.4.3)

Bumps [hypothesis](https://github.com/HypothesisWorks/hypothesis) from 6.13.10 to 6.17.4.
- [Release notes](https://github.com/HypothesisWorks/hypothesis/releases)
- [Commits](https://github.com/HypothesisWorks/hypothesis/compare/hypothesis-python-6.13.10...hypothesis-python-6.17.4)

remove History.mask to fix masking="none" issues

Closes #222

See merge request !294

Remove the `nodata` parameter

See merge request !296

set flags at all (i.e. through early returns) or only UNTOUCHED
flags. This breaks the positional flagging scheme, which should
have one digit for every funtion applied.