refactor: use superspawn

[erisu]

Motivation and Context

Cleanup & use only superspawn.

Requires PR #851

Description

• Replace child_process with superspawn

Testing

• npm t

Checklist

• I've run the tests to see all new and existing tests pass

[codecov-commenter]

Codecov Report

Merging #859 into master will decrease coverage by 0.24%.
The diff coverage is 67.56%.

@@            Coverage Diff             @@
##           master     #859      +/-   ##
==========================================
- Coverage   74.76%   74.52%   -0.25%     
==========================================
  Files          13       13              
  Lines        1736     1680      -56     
==========================================
- Hits         1298     1252      -46     
+ Misses        438      428      -10     

Impacted Files	Coverage Δ
bin/templates/scripts/cordova/lib/run.js	20.37% <10.00%> (-0.36%)	⬇️
bin/templates/scripts/cordova/lib/build.js	50.51% <33.33%> (-0.26%)	⬇️
bin/templates/scripts/cordova/lib/Podfile.js	73.33% <50.00%> (-0.26%)	⬇️
bin/templates/scripts/cordova/lib/listDevices.js	100.00% <100.00%> (ø)
bin/templates/scripts/cordova/lib/versions.js	100.00% <100.00%> (+9.75%)	⬆️

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