v0.9.0

• Remove compatibility with Webpack 2 release candidates
• Fix infinite recursion with certain code splitting configurations (#37)
• Fix Node.js compatibility declaration, 0.12 wasn't working
• Upgrade dev dependencies
• Improve test coverage and CI comprehensiveness: Webpack 1 and 2 are
  now tested with Node 4 through 7 on both Linux and Windows. Also,
  tests are re-run weekly on Travis to ensure ongoing compatibility
• Small improvements in README: updated copyright, more badges