Aas-core-meta

=========
This is a minor enhancement version. We implement the invariant on
the category of a data element in a more systematic manner.

* Encapsulate data element category in V3RC02 (121)
* Ensure Data element category in V3RC02

=========
This is a minor bug-fix version. We release it so we can start working
on tests with XML data.

* Enforce Extension value match type in V3RC02 (119)
* Revert back AASd-119 in V3RC02 (118)

=========
This is a version with fixes which were necessary for generating
the JSON test data automatically using aas-core3.0rc02-testgen,
and making sure that the aas-core-codegen generates the C code
such that it passes all the unit tests for JSON.

XML tests are still pending.

* Invert AASd-119 in V3RC02 (116)
* Fix ``xs:string`` pattern for V3RC02 (115)
* Check non-none of message broker in inv. of V3RC02 (114)
* Fix nullness in inv. AASd-119 in V3RC02 (113)
* Remove ill-defined constraint 116 from V3RC02 (111)
* Remove unique idShort from list elements in V3RC02 (110)

=========
This is a bug-fix version, where our spec turned out to be incorrect
from the programming point of view.

* Fix invariant on specific_asset_id in V3RC2 (108)
* Fix length invariant of id-shorts in V3RC2 (107)
* Fix AnyURI patterns for UTF-32 (106)

=====================
In this version we fix a couple of inconsistencies with the book which
were spotted during the reviews.

* Sort out ``modelType`` in V3RC02 (104)
* Make ``RelationshipElement`` concrete in V3RC02 (103)

========================
This is a pre-release version.

* Introduce ``get_*_or_default`` as methods to V3rc2 (71)
* Remove setting default values in constructors (70)
* Fix the nonsensical invariant in Entity in V3RC02 (69)
* Check category only if set in V3RC02 (68)
* Fix invariants in V3RC02 (67)