Pandoc-xnos

* Support for references in bracketed spans (pandoc-fignos
Issue 58).

* Allow xnos-number-sections with docx (pandoc-fignos Issue 59).

* Fixed new problem with section numbers and html output.

* A workaround is provided for a bug in boolean metadata handling
for pandoc 2.2.3 and 2.2.3.1 (see pandoc Issue 4819).
* A bug involving xnos-number-sections and unattributed
equations is fixed (see pandoc-xnos Issue 30).
* Added processing for references in spans (pandoc-xnos
merge request 6).
* Provides a helpful error message when On or Off are used as
boolean xnos metadata values. As of pandoc 2.2.2 this is no
longer allowed.

* Moving to MAJOR.MINOR.PATCH release semantic versioning as per
https://semver.org/. API changes will result in an increment
of the MAJOR number. This helps fix pandoc-fignos Issue 46.

* Added support for AMS-style equations referencing
(pandoc-eqnos Issue 27).