update to build tool 27

[championswimmer]

[codecov[bot]]

Codecov Report

Merging #81 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #81   +/-   ##
=========================================
  Coverage     27.39%   27.39%           
  Complexity       33       33           
=========================================
  Files            83       83           
  Lines          1865     1865           
  Branches         91       91           
=========================================
  Hits            511      511           
  Misses         1319     1319           
  Partials         35       35

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