Merge branch 'version-0.2.1' into 'master'

Version 0.2.1 release

See merge request !130
4 jobs for 0.2.1 in 2 minutes and 45 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #369569
documentation

00:00:51

passed #369568
python-3.5

00:02:45

passed #369567
python-3.6

00:02:30

passed #369566
python-3.7

00:02:40

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