• Update markdownlint dependency to 0.18.0
  • Adds MD048/code-fence-style
  • Adds --fix for MD007/ul-indent
  • Adds markdownlint-disable-file/markdownlint-enable-file inline comments
  • Improves MD006/MD007/MD009/MD013/MD030
• Ignore JavaScript-style comments in JSON config files
• Address npm audit issues