Aas-core-codegen

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This version includes minor enhancements to make the work of
the aas-core-testgen a bit easier.

* Encapsulate retrieval of the primitive type (201)
* Update to aas-core-meta 2022.6.20 (200)
* Make ``TypeAnnotationExceptOptional`` public (199)

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This version comprises minor fixes so that we can publish
a pre-release of the C SDK.

C
--
* Fix C for InspectCode (197)
* Prefix all ``cref``'s with ``Aas.`` in C (196)
* Reduce interfaces if descendants in C (195)

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* Adapt and re-record for aas-core-meta 2022.6.19 (192)
* Infer non-nullness in the intermediate (186)
* Fix duplicate inheritance of pattern constraints (185)
* Exclude external classes stringify assertions (181)

C
--
* Make C classes with children implement interfaces (190)
* Allow classes without constructor arguments in C (189)
* Fix C generation for CodeInspect and testgen (187)
* Fix UTF-32 regexes for C UTF-16-only engine (183)
* Relax constraints on C namespace identifiers (182)

XSD
---
* Strip anchors in XSD patterns (188)

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* Fix a typo in RDF query message (179)

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* Fix XSD for abstract classes without implementers (177)

===================
* Move ``requirements-dev`` back to ``setup.py`` (175)