v8.0.0

• Pass caller metadata to Babel.

v8.0.0-beta.1

• More fixes for Babel 7 support
• Drop Node 4 support
• Use Babel 7's async transform support

v8.0.0-beta.0

• General codebase cleanup
• First pass upgrades for Babel 7.x support

v7.0.0

• Drop Node 0.10/0.12/5 support
• Make babel-core a peerDependency (compat with v6/v7)

6.0.0

Upgrade to Babel 6.0.0: http://babeljs.io/blog/2015/10/29/6.0.0/