Add aarch64-apple to CI

[odow]

Closes #193

• Requires Add Apple M-series to CI jobs Clp.jl#149

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.27%. Comparing base (0424af2) to head (31f035d).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #229      +/-   ##
==========================================
+ Coverage   88.61%   90.27%   +1.66%     
==========================================
  Files           2        2              
  Lines         360      360              
==========================================
+ Hits          319      325       +6     
+ Misses         41       35       -6     

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[odow]

Closing a won't-fix. This was a bit premature.