Update ADOPTERS.md

[trevjonez]

Add CVS/Aetna

[codecov]

Codecov Report

Merging #832 (f381c83) into develop (586eddb) will not change coverage.
The diff coverage is n/a.

❗ Current head f381c83 differs from pull request most recent head ee7e3a1. Consider uploading reports for the commit ee7e3a1 to get more accurate results

@@            Coverage Diff             @@
##             develop     #832   +/-   ##
==========================================
  Coverage      59.62%   59.62%           
  Complexity       799      799           
==========================================
  Files            213      213           
  Lines           4384     4384           
  Branches         690      690           
==========================================
  Hits            2614     2614           
  Misses          1445     1445           
  Partials         325      325           

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