Only base cache identifier on babel options from pkg.json

[danez]

No description provided.

[codecov]

Codecov Report

Merging #468 into master will increase coverage by 1.23%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #468      +/-   ##
==========================================
+ Coverage   78.21%   79.44%   +1.23%     
==========================================
  Files           6        6              
  Lines         179      180       +1     
  Branches       48       47       -1     
==========================================
+ Hits          140      143       +3     
+ Misses         18       17       -1     
+ Partials       21       20       -1

Impacted Files	Coverage Δ
src/utils/exists.js	100% <ø> (ø)	⬆️
src/utils/read.js	100% <100%> (+50%)	⬆️

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