RM-252173 Release json_schema 5.1.8

[rmconsole-readonly-wk]

Pull Requests included in release:

• Patch changes:
  • Avoid unnecessary null pointer exception if reference schema is given
  • Fix ValidationResults.toString().
  • Mark an additionalProperty as evaluated.
  • Fix formatting

Requested by: @joecotton-wf

Diff Between Last Tag and Proposed Release: 5.1.7...Workiva:release_json_schema_5.1.8
Diff Between Last Tag and New Tag: 5.1.7...5.1.8

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[aviary2-wf]

Security Insights

No security relevant content was detected by automated scans.

Action Items

• Review PR for security impact; comment "security review required" if needed or unsure
• Verify aviary.yaml coverage of security relevant code

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