Merge master into openapi

[bkoelman]

Merges the master branch into openapi, which adds operation filters.

QUALITY CHECKLIST

• [x] Changes implemented in code
• [x] Complies with our contributing guidelines
• [x] Adapted tests
• [x] Documentation updated

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 86.66667% with 10 lines in your changes missing coverage. Please review.

Project coverage is 91.27%. Comparing base (18a4edf) to head (5df4928).

Files	Patch %	Lines
...NetCore/AtomicOperations/DefaultOperationFilter.cs	75.00%	1 Missing and 2 partials :warning:
...ation/JsonConverters/WriteOnlyDocumentConverter.cs	72.72%	2 Missing and 1 partial :warning:
...NetCore/AtomicOperations/IAtomicOperationFilter.cs	0.00%	2 Missing :warning:
...ore/Controllers/BaseJsonApiOperationsController.cs	95.55%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## openapi #1570 +/- ## =========================================== - Coverage 91.30% 91.27% -0.03% =========================================== Files 396 398 +2 Lines 12834 12905 +71 Branches 2028 2038 +10 =========================================== + Hits 11718 11779 +61 - Misses 725 731 +6 - Partials 391 395 +4 ```

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