v7.2.0

• Downgraded babel-runtime peer dependency to 5.x due to:
  • Bugs in babel-runtime 6.x
  • All babel plugins still depend on runtime 5.x, having a top-level 6.x dependency forces duplicate copies of runtime 5.x in every plugin, resulting in the installation using much larger disk space and the build booting much slower.
• More reliable hot-reload for nested child components.