fix: Remove support for net5;net461

[glennawatson]

Net 5 support is being dropped in the near future. Remove support. https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core

net461 support is being dropped https://devblogs.microsoft.com/dotnet/net-framework-4-5-2-4-6-4-6-1-will-reach-end-of-support-on-april-26-2022/

Bump the version number

[codecov-commenter]

Codecov Report

Merging #558 (b39636e) into main (d7b7459) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #558   +/-   ##
=======================================
  Coverage   71.36%   71.36%           
=======================================
  Files         214      214           
  Lines       10575    10575           
=======================================
  Hits         7547     7547           
  Misses       3028     3028           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d7b7459...b39636e. Read the comment docs.

[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.