housekeeping: Cleanup syntax

[glennawatson]

fix: public api tests

What kind of change does this PR introduce?

Cleanup with newer C# syntax.
Fix up the public API tests

What is the current behavior?

Should be the same with different syntax

What is the new behavior?

Using refactor tools clean up the API

What might this PR break?

If the cleanup tools fail.

[codecov]

Codecov Report

Merging #789 (0d04cee) into main (3bfd740) will increase coverage by 0.11%.
The diff coverage is 60.37%.

@@            Coverage Diff             @@
##             main     #789      +/-   ##
==========================================
+ Coverage   57.44%   57.55%   +0.11%     
==========================================
  Files          58       58              
  Lines        3464     3367      -97     
==========================================
- Hits         1990     1938      -52     
+ Misses       1474     1429      -45     

Impacted Files	Coverage Δ
src/Akavache.Core/LoginInfo.cs	0.00% <0.00%> (ø)
src/Akavache.Core/LoginMixin.cs	0.00% <0.00%> (ø)
src/Akavache.Core/MD5.cs	0.00% <0.00%> (ø)
src/Akavache.Core/Platforms/shared/MD5Managed.cs	0.00% <0.00%> (ø)
...rc/Akavache.Core/Platforms/shared/Registrations.cs	92.85% <ø> (ø)
src/Akavache.Core/Platforms/shared/StreamMixins.cs	0.00% <ø> (ø)
src/Akavache.Core/PreserveAttribute.cs	0.00% <0.00%> (ø)
src/Akavache.Core/RelativeTimeMixin.cs	0.00% <0.00%> (ø)
src/Akavache.Drawing/BitmapImageMixin.cs	0.00% <0.00%> (ø)
src/Akavache.Sqlite3/SqlLiteCache/SqlLite.cs	0.00% <0.00%> (ø)
... and 86 more

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.