v1.1.0

As the initial commit was marked in the package and on npm as v1.0.0 and this contains some important fixes, I'm tagging this as a minor release here and on npm.

• Corrected valid <mj-list>/<mj-li> dependencies
• Added a default padding-left value to ensure that bullet icons don't overflow their container
• Added a default gutter value
• Added <mj-head> code for a11y
• Removed unimplemented custom bullet icon code #1
• Fixed syntax in .mjmlconfig
• Docs: General updates and clarifications
• Docs: Added screenshot and example output code #2
• Dev: Added sheerun/modern-node for development
• Dev: Formatted and linted project
• Dev: Added some basic tests
• Dev: Added a couple of simple GitHub Actions

cd45ef5...v1.1.0