mermaid2 plugin, linkml & linkml-runtime version update (#214)

* add auto generated citation

* update changelog

* superfences interferes with mermaid, removing to allow diagrams to be generated correctly

* remove changelog addition

* add mermaid2 plugin

* update dependencies

Author: sierra-moxon

mkdocs.yml

@@ -10,6 +10,7 @@ theme:
     - content.tabs.link
 plugins:
   - search
+  - mermaid2
 markdown_extensions:
   - pymdownx.highlight:
   - pymdownx.inlinehilite