Update to build against JsonApiDotNetCore v5.1.2

[bkoelman]

Update to build against JsonApiDotNetCore v5.1.2.

Removed special handling for local dates, as it turns out that can be controlled via [BsonDateTimeOptions(Kind = DateTimeKind.Local)], as described here. Updated tests accordingly.

QUALITY CHECKLIST

• Changes implemented in code
• Complies with our contributing guidelines
• Adapted tests
• N/A: Documentation updated

[codecov]

Codecov Report

Merging #18 (3f992c0) into master (1fddd2e) will increase coverage by 0.51%.
The diff coverage is 100.00%.

❗ Current head 3f992c0 differs from pull request most recent head 4ef500b. Consider uploading reports for the commit 4ef500b to get more accurate results

@@            Coverage Diff             @@
##           master      #18      +/-   ##
==========================================
+ Coverage   96.57%   97.09%   +0.51%     
==========================================
  Files          15       13       -2     
  Lines         263      241      -22     
==========================================
- Hits          254      234      -20     
+ Misses          9        7       -2     

Impacted Files	Coverage Δ
...ngoDb/Configuration/ServiceCollectionExtensions.cs	100.00% <ø> (ø)
...DotNetCore.MongoDb/Repositories/MongoRepository.cs	96.89% <100.00%> (ø)

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