tributejs 4.0.0

Dropdown positioning fix, build improvements and z-index fix

on Node.js NPM

This release improves the dropdown positioning, npm package publication and z-index customization issues.

Changes:

• BREAKING CHANGE: We have removed z-index from the JavaScript, it is now only set in the CSS so it can be overridden in your own styles. #307
• Menu Positioning: Improve menu positioning when the input isn't the lowest element on the page. #331
• NPM package missing files: Fixed an issue where the src directory was not included in the NPM release and some other smaller build improvements. #317, #316, #315

Thanks to @iskandiar, @aldhsu, @DanielRuf for their contributions to this release!