Switch to opam 2.1.0~rc2 (reverts 500b7bc0)

3 jobs for master in 4 minutes and 41 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  .Pre
passed #82026
make-targets

00:00:13

 
  Build
passed build-images

 
  Publish
passed #82028
publish-docker

00:04:28