and another for Config calls

Bump scipy from 1.6.0 to 1.6.1

See merge request !230

Bump pytz from 2020.5 to 2021.1

See merge request !229

Bump pandas from 1.2.1 to 1.2.2

See merge request !228

Bump numpy from 1.20.0 to 1.20.1

See merge request !227

Bump more-itertools from 8.6.0 to 8.7.0

See merge request !226

Bump importlib-metadata from 3.4.0 to 3.7.0

See merge request !224

Saqc documentation "pipeline"

See merge request !220

Bumps [scipy](https://github.com/scipy/scipy) from 1.6.0 to 1.6.1.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](https://github.com/scipy/scipy/compare/v1.6.0...v1.6.1)

Bumps [pytz](https://github.com/stub42/pytz) from 2020.5 to 2021.1.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](https://github.com/stub42/pytz/compare/release_2020.5...release_2021.1)

Bumps [pandas](https://github.com/pandas-dev/pandas) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Changelog](https://github.com/pandas-dev/pandas/blob/master/RELEASE.md)
- [Commits](https://github.com/pandas-dev/pandas/compare/v1.2.1...v1.2.2)

Bumps [numpy](https://github.com/numpy/numpy) from 1.20.0 to 1.20.1.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/master/doc/HOWTO_RELEASE.rst.txt)
- [Commits](https://github.com/numpy/numpy/compare/v1.20.0...v1.20.1)

Bumps [more-itertools](https://github.com/more-itertools/more-itertools) from 8.6.0 to 8.7.0.
- [Release notes](https://github.com/more-itertools/more-itertools/releases)
- [Commits](https://github.com/more-itertools/more-itertools/compare/v8.6.0...v8.7.0)

Bumps [importlib-metadata](https://github.com/python/importlib_metadata) from 3.4.0 to 3.7.0.
- [Release notes](https://github.com/python/importlib_metadata/releases)
- [Changelog](https://github.com/python/importlib_metadata/blob/main/CHANGES.rst)
- [Commits](https://github.com/python/importlib_metadata/compare/v3.4.0...v3.7.0)

Flags

See merge request !218

added simple __repr__ and __str__.