620b9bf52d
Upgrade to latest version of Asciidoctor because we were several versions behind and were steadily incurring more technical debt. * Replace project-version attribute in Asciidoctor I had removed the project-version attribute, but the docs use it all over, so I put it back. * Removed unneeded repositories It turns out that those repositories are not needed. A cross-reference was incorrectly formatted (missing the # character).