1.7.0

Added:

• Promise initializer can throw errors
• Promise initializer can return a promise
• isCancelled property
• await global function

Fixed:

• Promise's timeout and cancellation race conditions

1.6.0

Added:

• Network requests: fetch, upload, download
• Errors: PromiseError.cancelled, PromiseError.empty
  Fixes

1.5.0

• Added Promise.any
• Fixes