Update babel config

Changelog :

• Jump to babel 7
• Add present-env

v1.3.1

Fix the issue with events getting erase by default lightbox actions

v1.3.0

Changelog

• More customization
• Better animations
• Added more options

v1.2.4

Changelog

Altered slightly default animations
Clones no longer add duplicates in navigation
Fix export in index.js
Fix dynamic count of elements

v1.1

Improvements :

• Added animations
• Added Youtube support
• Added Google Map support
• Improved custom events handling
• Added support for direct data feed
• Improved UI elements