Remove python3.5 compatibility

4 jobs for master in 41 seconds (queued for 10 seconds)
Status Name Job ID Coverage
  Py36
passed test-py3.6 #108100

00:00:10

92.0%
 
  Py37
passed test-py3.7 #108101

00:00:10

92.0%
 
  Py38
passed test-py3.8 #108102

00:00:10

92.0%
 
  Py39
passed test-py3.9 #108103

00:00:09

92.0%