Target net80 in the test project.

Code formatting. No feature changes.

Update packages. Code cleanup.

Test project upgraded to net70. No changes to the library.

Standardise naming. No feature changes.

Update test projects to Framework 4.8 (no code changes).

Documentation link fixes. No code changes.

Use inheritdoc in the implementing class. No code changes.

Code tidy-up only.

4.0.0 A major update to target netstandard2.0 which can be consumed by all modern project types. The public API is unchanged.

3.1.2 Initial commit after loss of the Azure DevOps repository.