Bump scipy from 1.6.2 to 1.6.3

See merge request !266

Bump pytz from 2020.1 to 2021.1

See merge request !267

Bumps [pytz](https://github.com/stub42/pytz) from 2020.1 to 2021.1.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](https://github.com/stub42/pytz/compare/release_2020.1...release_2021.1)

Bumps [scipy](https://github.com/scipy/scipy) from 1.6.2 to 1.6.3.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](https://github.com/scipy/scipy/compare/v1.6.2...v1.6.3)

Revert "refactored register.py as @schaefed suggested, renamed former CallCtrl to CallState and made it more KISSier"

This reverts commit df70798c.

Flagger Translations

See merge request !237

refactored register.py as @schaefed suggested, renamed former CallCtrl to CallState and made it more KISSier

Filter funcs

See merge request !256

Fixes for fuzzy tests

See merge request !258

if the history is altered manually (by a data proc function) newly inserted indexes and data must be
not masked and therefore must use `True` as default value for the mask. Otherwise nan's could be
propagate through the history. Hard to explain...

Fixed libtest

See merge request !255

Dios integration

Closes #188

See merge request !252

for bigger datasets.

Python 3.9 testing

See merge request !253

Update requirements and dependencies

See merge request !254

code formatting with black

Closes #185

See merge request !251

Drift correct generalisation

See merge request !238

Cleanup obsolete functions

Closes #176 and #187

See merge request !250

bump dependencies

See merge request !249

Fix the fuzzy tests

See merge request !239

API interface fixes

See merge request !236