Support of OpenXml >= 2.11.0
Release after the PR #71 , which fix a fatal crash with OpenXml >= 2.11.0.
[TLDR] Details are explained in #70
To conform to the OpenXml XSD, this library use an internal method of OpenXml library, to resolve the order of the style tags.
After some internal refactoring of OpenXml, it appears the internal code was no longer accessible.
Taylor, one of the maintainers of OpenXml gratefully provide a PR to accommodate the new API.