Increased latest version to 2.2.1b0 [skip ci]

5 jobs for master in 11 minutes and 24 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #172284
docker
build_linux_36

00:07:01

92.0%
passed #172285
docker
build_linux_37

00:07:11

92.0%
passed #172282
macosx
build_macosx_36

00:08:33

91.0%
passed #172283
macosx
build_macosx_37

00:05:47

91.0%
 
  Deploy
passed #172286
docker
deploy_beta

00:02:51