Add iOS CI back in

[adam-fowler]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (df07a99) 80.43% compared to head (71aa248) 80.43%.

Additional details and impacted files

@@           Coverage Diff           @@
##            7.x.x     #599   +/-   ##
=======================================
  Coverage   80.43%   80.43%           
=======================================
  Files          77       77           
  Lines        6465     6465           
=======================================
  Hits         5200     5200           
  Misses       1265     1265           

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