v2.4.0

• Added documentation site via docsify under /docs to allow the documentation to be versioned, hosted on GitHub, and easy to contribute to - jscroll.com will now be routed to this site
• Updated grunt dependency to v1.0.2
• Updated gruntify-eslint dependency to v4.0.0
• Added package-lock.json
• Updated minimum jQuery version to 1.8.0 to prevent vulnerability warnings
• Changed jQuery from being included in dependencies to peerDependencies
• Added grunt-contrib-uglify to dependencies
• Added grunt uglify task and added it to the default task
• Added npm run build script to run grunt default task
• Added dist/jquery.jscroll.min.js from uglify task - fixes #133
• Added eslint rule eol-last and set to never