Sphinx-hoverxref

-------------

* Require ``sphinxcontrib-bibtex>=2.6.0`` (https://github.com/readthedocs/sphinx-hoverxref/pull/281)
* Sphinx 5 is the minimum supported version (https://github.com/readthedocs/sphinx-hoverxref/pull/282)
* Default ``hoverxref_api_host`` to ``/_`` to make use of our proxied API (https://github.com/readthedocs/sphinx-hoverxref/pull/134)

-------------

* Handle explicit intersphinx inventory names in all domains --not just ``std`` (https://github.com/readthedocs/sphinx-hoverxref/pull/236)

-------------

* New config ``hoverxref_tooltip_lazy`` to improve large page experience (https://github.com/readthedocs/sphinx-hoverxref/pull/227/)

-------------

* Ignore ``pending_xref`` (missing references) that don't have domains (https://github.com/readthedocs/sphinx-hoverxref/pull/210)

-------------

* Prefix all the CSS classes with ``hxr-`` to avoid collisions with other frameworks

-------------

* Fix an issue with intersphinx and domains when the ``reftype`` was unknown