Added URL checker CI job.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
3 jobs for feature/add_urlchecker in 1 minute and 23 seconds
Status Name Job ID Coverage
  Test
passed test_py_tools_ds #52537

00:00:21

68.0%
passed test_styles #52538

00:00:10

failed test_urls #52539

00:00:51

 
Name Stage Failure
failed
test_urls Test


Done. The following urls did not pass:
https://github.com/travis-ci/travis-api/issues/196
https://cryptography.io/latest/hazmat/primitives/asymmetric/rsa/
http://www.gdal.org/structGDALWarpOptions.html
https://py-tools-ds.readthedocs.io/en/latest/?badge=latest
https://pyup.io/repos/github/danschef/py_tools_ds/
ERROR: Job failed: exit code 1