Prepare v9.2.0 release

[adams85]

Describe the purpose of your pull request

Prepares v9.2.0 release.

Also, implements the missing GetKeyAndValue feature (since expectedly this will be the last version that supports .NET 4.5 and block waiting synchronous APIs).

Requirement checklist (only if applicable)

• [x] I have covered the applied changes with automated tests.
• [x] I have executed the full automated test set against my changes.
• [ ] I have validated my changes against all supported platform versions.
• [ ] I have read and accepted the contribution agreement.

[sonarcloud[bot]]

Quality Gate passed

Issues
30 New issues
0 Accepted issues

Measures
0 Security Hotspots
89.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud