Add @alfredxing to the @jekyll/core team.
Merge pull request #3218 from jekyll/alfredxing
Update history to reflect merge of #3218 [ci skip]
Add jekyll-mermaid to the list of plugins.
Merge pull request #3222 from jasonbellamy/jekyll-mermaid-plugin
Update history to reflect merge of #3222 [ci skip]
Add appveyor configuration YAML.
Tweak appveyor.yml.
Tests should run now.
README.markdown: Add AppVeyor badge.