bump version

- bump version

 - dont reset zIndex to preserve fade effect ( if any )

 - bump version

 - upgrade modules

 - release with compact directory structure
 - add `style` in `package.json`
 - add `main` and `browser` field in `package.json`.
 - further minimize generated js file with mangling and compression
 - remove assets files from git
 - patch test code to make it work with upgraded modules
 - update window only if window is defined
 - bump version

fix vulnerability

 - remove deprecated `ldLoader`

upgrade modeuls

remove unused demo folder

 - add `setZmgr` for managing z-index globally.

 - fix bug: when `auto-z` is set to true, z value isn't calculated
   correctly.

fix typo in package.json