Merge master (v5.0.3) into openapi branch

[bkoelman]

Aside from the merge itself, the last two commits are manual additions worth reviewing:

• Fix build warning: duplicate package reference
• Package updates, centralize versions, address breaking changes
  • Interestingly, the swagger.json files:
    • now contain more specific descriptions, based on HTTP status code
    • "minLength": 1 is being added, likely related to requiredness/nullability; I haven't investigated this further

Please merge this PR as a merge commit, so we can keep syncing up with master.

[codecov]

Codecov Report

Merging #1186 (47320f0) into openapi (f65b7fe) will increase coverage by 0.00%.
The diff coverage is 98.17%.

@@           Coverage Diff            @@
##           openapi    #1186   +/-   ##
========================================
  Coverage    92.24%   92.24%           
========================================
  Files          302      303    +1     
  Lines         8768     8774    +6     
========================================
+ Hits          8088     8094    +6     
  Misses         680      680           

Impacted Files	Coverage Δ
...otNetCore/Serialization/Objects/AtomicReference.cs	100.00% <ø> (ø)
.../Serialization/Objects/ResourceIdentifierObject.cs	100.00% <ø> (ø)
...DotNetCore/Serialization/Objects/ResourceObject.cs	100.00% <ø> (ø)
...tNetCore/Serialization/Objects/SingleOrManyData.cs	100.00% <ø> (ø)
...Core/Serialization/Request/Adapters/BaseAdapter.cs	100.00% <ø> (ø)
...zation/Request/Adapters/ResourceIdentityAdapter.cs	100.00% <ø> (ø)
...n/Request/Adapters/ResourceIdentityRequirements.cs	100.00% <ø> (ø)
...ApiDotNetCore.SourceGenerators/SourceCodeWriter.cs	97.56% <97.50%> (+0.08%)	⬆️
...Core.SourceGenerators/ControllerSourceGenerator.cs	98.43% <98.43%> (-0.03%)	⬇️
...penApi/SwaggerComponents/JsonApiSchemaGenerator.cs	98.33% <100.00%> (ø)
... and 12 more

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