0.19.1 - Higher order copy propagation

[aboeglin]

• exhaustive patterns for instance methods
• add an optimization pass for higher order copy propagation
• add rewrite rule for pipe(map(f), map(g)) => map(pipe(f, g))

[codecov]

Codecov Report

Merging #105 (08b437f) into master (4ddd67f) will increase coverage by 0.02%.
The diff coverage is 100.00%.

❗ Current head 08b437f differs from pull request most recent head 59a8cf4. Consider uploading reports for the commit 59a8cf4 to get more accurate results

@@            Coverage Diff             @@
##           master     #105      +/-   ##
==========================================
+ Coverage   67.52%   67.54%   +0.02%     
==========================================
  Files          75       75              
  Lines       12022    12024       +2     
==========================================
+ Hits         8118     8122       +4     
+ Misses       3904     3902       -2     

Impacted Files	Coverage Δ
compiler/main/Infer/ExhaustivePatterns.hs	82.67% <100.00%> (+0.10%)	⬆️

... and 1 file with indirect coverage changes

[brekk]