Django-gisserver

* Included Django 3.2 in test matrix.
* Fixed preserving axis orientation by passing Incoming SRS data is directly to GDAL.
* Fixed doc typoo's
* Updated pre-commit hooks.
* Drop universal wheel declaration (Python 2 is no longer supported)

* Fixed double ``>`` sign in ``<Filter xml..>>`` code when namespaces were auto-corrected.
* Fixed basic ``<Beyond>`` support for distance queries.
* Fixed parameter name for ``round()`` function.

* Improve HTML page with "Using This WFS" section.
* Fixed Django 3.1 compatibility.
* Improved error message for `<fes:PropertyIsLike>` operator when comparing against a `<fes:ValueReference>` instead of `<fes:Literal>`.

* Added browsable HTML views for WFS views, which can be extended/overwritten.
* Added content-disposition header to export formats, to have a proper filename.
* Added "abstract" property to field classes to provide a description.
* Consider `?SERVICE=WFS` as default for `WFSView` views.

* Added `FeatureType.show_name_field` to show/hide `<gml:name>` and GeoJSON `geometry_name`.
* Added `FeatureType.xml_prefix` so the outputted namespace prefix can be changed from "app:" to anything else.
* Added `FeatureType.xsd_type_class` so this can be overwritten easier.
* Added `XsdNode.to_python()` to support input data parsing.
* Added `GISSERVER_SUPPORTED_CRS_ONLY` to accept only the listed coordinate systems.
* Rename `is_gml` -> `is_geometry`.
* Fixes for CITE compliance testing for WFS Basic conformance:
* Added `ImplementsBasicWFS` flag in capabilities document.
* Added attribute resolving, like `gml:id` in XPath.
* Added querying support for the `gml:name` field.
* Added support to fetch multiple RESOURCEID objects in a single request.
* Fixed unwanted exception when the RESOURCEID format is invalid, empty results are returned instead.
* Fixed locator for RESOURCEID errors.
* Fixed filter type exception, now `OperationParsingFailed` instead of `InvalidParameterValue`.
* Fixed datetime and boolean comparisons.
* Fixed exception message when `<PropertyIsLessThanOrEqualTo>` receives an GML object.
* Fixed exception message for bad SRID's.
* Internal code reorganizations.

* Fixed `GetPropertyValue` calls for non-db optimized rendering.