Add Julia v1.2 in CI

[blegat]

No description provided.

[codecov]

Codecov Report

Merging #2034 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2034      +/-   ##
==========================================
+ Coverage    91.4%   91.41%   +<.01%     
==========================================
  Files          33       33              
  Lines        4212     4216       +4     
==========================================
+ Hits         3850     3854       +4     
  Misses        362      362

Impacted Files	Coverage Δ
src/_Derivatives/forward.jl	97.62% <0%> (ø)	⬆️
src/operators.jl	86.94% <0%> (+0.04%)	⬆️
src/parse_nlp.jl	90.96% <0%> (+0.05%)	⬆️
src/JuMP.jl	84.55% <0%> (+0.11%)	⬆️

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@c1b730c). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2034   +/-   ##
=========================================
  Coverage          ?   91.46%           
=========================================
  Files             ?       33           
  Lines             ?     4217           
  Branches          ?        0           
=========================================
  Hits              ?     3857           
  Misses            ?      360           
  Partials          ?        0

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Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c1b730c...ea3ca7c. Read the comment docs.