rewrite of _restoreFlags() in register.py which was needed because of a problem updating meta, which raised an index error when setting meta on an empty history

Historymeta

See merge request !284

Expose data and flag through `SaQC`

See merge request !282

the previous implementation, would only mark the start and end point(s) of a constant plateaus if it is as big as window or larger.

fix for patternrec

See merge request !191

fixed some plotting issues

See merge request !283

Explicit harm target

See merge request !281

plotting routine

See merge request !223

[Fix] Make source-target workflow visible for `SaQC._planned`

See merge request !272

note that `from saqc.core import SaQC` does not work because of cyclic imports, so we `import saqc` and use `bla(..) -> saqc.SaQC`.

Bump hypothesis from 6.10.1 to 6.13.10

See merge request !274

Bump click from 7.1.2 to 8.0.1

See merge request !273

Bump matplotlib from 3.4.1 to 3.4.2

See merge request !275

Bump numpy from 1.20.2 to 1.20.3

See merge request rdm-software/saqc!276

Bump pyarrow from 4.0.0 to 4.0.1

See merge request !277

Bump pytest from 6.2.3 to 6.2.4

See merge request !278

Bump typing-extensions from 3.7.4.3 to 3.10.0.0

See merge request !279

Bump six from 1.15.0 to 1.16.0

See merge request !280

Bumps [six](https://github.com/benjaminp/six) from 1.15.0 to 1.16.0.
- [Release notes](https://github.com/benjaminp/six/releases)
- [Changelog](https://github.com/benjaminp/six/blob/master/CHANGES)
- [Commits](https://github.com/benjaminp/six/compare/1.15.0...1.16.0)

Bumps [typing-extensions](https://github.com/python/typing) from 3.7.4.3 to 3.10.0.0.
- [Release notes](https://github.com/python/typing/releases)
- [Commits](https://github.com/python/typing/compare/3.7.4.3...3.10.0.0)