** BROKEN dist/min, skip this version

Updated to ES6 classes, dropped react<15.3 support.

• #165 @nkbt Update-deps
• #161 @Holi0317 Use ES6 class for react components

Same as v3.2.2, fixes 3.3.0 bad release...

** Breaking change, skip this version...

Updated to ES6 classes, dropped react<15.3 support.

• #165 @nkbt Update-deps
• #161 @Holi0317 Use ES6 class for react components

Updated to ES6 classes, dropped react<15.3 support.

• #164 @nkbt Update-deps
• #162 @Andarist/es6-class Refactored to use es6 classes

• #159 @nkbt Add-migration-guide-v2-to-v3
• #158 @nkbt Update-to-create-react-class-and-prop-types
• #157 @nkbt refresh
• #81 npmcdn-to-unpkg-bot/npmcdn-to-unpkg Replace npmcdn.com with unpkg.com

Compatibility with new React 15.5.4

• Refresh #156 by nkbt
• Migrated deprecated React.PropTypes and React.createClass #155 by Andarist

• #77 @nkbt 76-add-hasNestedCollapse-prop

• #75 @nkbt rename-unmount-closed

• #74 @nkbt add-back-fixedHeight
• #73 @nkbt add-collapse-auto-unmount

• #72 @nkbt rewrite