Add typing hints to simplexml

2 jobs for type-simplexml in 13 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
failed run-test #16447

00:00:13

 
  Build
skipped run-build #16448
 
Name Stage Failure
failed
run-test Test
  File "/home/gitlab-runner/builds/c0eaa480/0/linkmauve/python-nbxmpp/test/unit/test_jid_parsing.py", line 51, in test_invalid_jids
JID(jid)
AssertionError: DomainpartNotAllowedChar not raised

----------------------------------------------------------------------
Ran 32 tests in 0.314s

FAILED (failures=1)
ERROR: Job failed: exit status 1