Read prettier config file if exists to determine prettier options

[spiroka]

closes #78

[khanbot]

CLA signature looks good 👍

[codecov]

Codecov Report

Merging #172 (bc629ec) into master (aae6783) will increase coverage by 98.60%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           master     #172       +/-   ##
===========================================
+ Coverage        0   98.60%   +98.60%     
===========================================
  Files           0        5        +5     
  Lines           0      358      +358     
  Branches        0       57       +57     
===========================================
+ Hits            0      353      +353     
- Misses          0        5        +5     

Impacted Files	Coverage Δ
src/convert.js	92.30% <ø> (ø)
src/cli.js	100.00% <100.00%> (ø)
src/compute-newlines.js	97.72% <0.00%> (ø)
src/transform.js	99.15% <0.00%> (ø)
src/detect-jsx.js	100.00% <0.00%> (ø)

[spiroka]

cli.js now creates a new commander.Command instance for every run instead of using the default instance. This was necessary because options are cached which made some unit tests fail by options being carried over from previous tests.

[kevinbarabash]

Thanks for adding this feature and for the awesome tests. This change appears to break permalinks in the playground. It just loads the page with all of the defaults. That'll need to be fixed before this can be merged.

[spiroka]

Found the problem. Should work now.

[aminya]

This is very nice! It will decrease the git diff, and so it will be easier to review the changes!

[kevinbarabash]

LGTM. Thanks for fixing the permalink issue.