#16: Set platforms with the minimal working OS versions

[trasch]

Closes #16

[trasch]

Not sure about the .macOS(.v10_13), that might actually be too old

[FelixLisczyk]

According to this post, the some return type requires macOS 10.15 or later.

https://forums.swift.org/t/opaque-result-types-on-mojave/26025

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.76%. Comparing base (d825046) to head (3c17d27).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #17   +/-   ##
=======================================
  Coverage   91.76%   91.76%           
=======================================
  Files           1        1           
  Lines         170      170           
=======================================
  Hits          156      156           
  Misses         14       14           

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[FelixLisczyk]

@nicklockwood My macOS app still fails to compile when archiving. The some return type requires macOS 10.15 or later.

[nicklockwood]

@FelixLisczyk sorry about that - try again now

[FelixLisczyk]

Thank you! 👍