Remove pre-release package references

The post-can-reflect releases from CanJS 3.9 are all stable, so packages shouldn't be depending on pre-releases now.

can-reflect

v3.2.0

3.2.0

Upgrade StealJS

The steal, steal-tools, and related testing plugins have been updated to the latest versions.

Added Construct.ReturnValue

#30 Allows to return a custom value (Object) for a new instance.

Extend with Object.defineProperty

#29 - Avoid calling setters when extending instance for prototype.