WFS 2.0 URL building

[geographika]

In WFS 2.0 GetFeature requests currently fail for MapServer URLs containing ?map=path/my.map&
This is the same issue as #533 - and unfortunately I missed that there was also an open pull request at #534 from @samtux
The approach in this pull request is slightly different - it reuses the build_get_url function from utils.

A few other notes:

• There is a warning about owslib\util.py:561: DeprecationWarning: cgi.parse_qsl is deprecated, use urllib.parse.parse_qsl instead so this has been updated
• the WFS GetFeature URL building allowed for the doseqparameter to be used (I'm not sure when this applies to WFS requests, but I added it to avoid any breaking changes). It allows for automatic duplicate keys for sequences e.g.

>>> urllib.urlencode({'keys': [1,2]}, doseq=True)
>>> 'keys=1&keys=2'
>>> urllib.urlencode({'keys': [1,2]}, doseq=False)
>>> 'keys=%5B1%2C+2%5D'

• I 've also added tests for the doseq and URLs with ampersands

[justb4]

Test fails for same reason as with my PR #613 for #587 initially:

tests/test_wfs3_pygeoapi.py::test_wfs3_pygeoapi FAILED

has nothing to do with your PR, but a recent change in pygeoapi and its demo server used in tests.

[coveralls]

Coverage: 59.054% (-0.01%) from 59.063% when pulling 5eab326 on geographika:url-fix into a365101 on geopython:master.

[github-actions]

This Pull Request has been inactive for 90 days. In order to manage maintenance burden, it will be automatically closed in 7 days.

[coveralls]

coverage: 59.719% (-0.006%) from 59.725%
when pulling 0af980b on geographika:url-fix
into f620405 on geopython:master.

[geographika]

Pull request rebased onto latest master branch and all tests passing.

The coveralls check is failing - it reports -0.006% coverage change, but I don't think this is correct - the changes in this pull requests are tested as previously. It also reported -0.2% on another run with the same code.

I ran into a similar issue on MapServer with small changes between runs. We increased the threshold to 1% to avoid this (see MapServer/MapServer#6223). Maybe OWSLib is also required to have 60% coverage?