fix(resolve-rc): look for babel in package.json and .babelrc.js

[danez]

rebased #456

[codecov]

Codecov Report

Merging #465 into master will decrease coverage by 0.55%.
The diff coverage is 91.66%.

@@            Coverage Diff             @@
##           master     #465      +/-   ##
==========================================
- Coverage   78.77%   78.21%   -0.56%     
==========================================
  Files           6        6              
  Lines         179      179              
  Branches       46       48       +2     
==========================================
- Hits          141      140       -1     
  Misses         18       18              
- Partials       20       21       +1

Impacted Files	Coverage Δ
src/index.js	83.69% <100%> (ø)	⬆️
src/resolve-rc.js	83.33% <87.5%> (-8.34%)	⬇️

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