added .codecov.yml

4 jobs for master in 2 minutes and 27 seconds (queued for 9 seconds)
Status Job ID Name Coverage
  Test
passed #156651161
test

00:01:21

88.5%
 
  Build
passed #156651162
compile

00:01:05

 
  External
passed codecov/patch

passed codecov/project

86.36364%