aurelia-metadata v0.4.0

Bug Fixes

• ResourceType: fix load to return Promise (a43e8d28)
• all: update compiler, fix core-js ref (b3dd9ea8)
• metadata:
  • store in private map (52aed24e)
  • fix initializer for _first property (740eb07c)
  • add the locator config back on a configure property (555612d1)

Features

• all: new decorator infrastructure (72a6226e)
• metadata: add firstOrAdd helper (8ba74b71)