Bump version number

5 jobs for 2.2.2 in 2 minutes and 31 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #3272
Go-py2.7

00:01:23

passed #3273
Go-py3.4

00:01:28

passed #3274
Go-py3.5

00:01:27

passed #3275
Go-py3.6

00:01:25

 
  Lint
passed #3276
Go-flake8

00:01:03