Add JuliaFormatter

[odow]

Closes #214

[codecov]

Codecov Report

Attention: Patch coverage is 59.83607% with 49 lines in your changes are missing coverage. Please review.

Project coverage is 50.42%. Comparing base (875577c) to head (717a7c2).
Report is 1 commits behind head on master.

Files	Patch %	Lines
src/helper.jl	42.85%	36 Missing ⚠️
src/MOI/MOI_callbacks.jl	81.25%	6 Missing ⚠️
src/xprs_callbacks.jl	66.66%	4 Missing ⚠️
src/license.jl	71.42%	2 Missing ⚠️
src/utils.jl	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #231      +/-   ##
==========================================
+ Coverage   50.36%   50.42%   +0.06%     
==========================================
  Files          10       10              
  Lines        4811     4829      +18     
==========================================
+ Hits         2423     2435      +12     
- Misses       2388     2394       +6     

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[odow]

Merging. I'll take the hit for sorting the currently open PRs.