feat: add .NET 8 support

[ahanoff]

No description provided.

[benmccallum]

THanks @ahanoff , I would've thought targeting net7 would be enough to add this to a net8 project, right? Happy to merge this, just thinking it through :P

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (20993f1) 89.28% compared to head (29c134a) 89.28%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #9   +/-   ##
=======================================
  Coverage   89.28%   89.28%           
=======================================
  Files           6        6           
  Lines         252      252           
  Branches       40       40           
=======================================
  Hits          225      225           
  Misses         18       18           
  Partials        9        9           

Flag	Coverage Δ
integration	89.28% <ø> (ø)

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