Version should be optional for dependencies and collections APIs (#138)
Version should be optional for dependencies and collections APIs (#138)

* Use Library.id in api

* Optional version for dependencies and collections

* Remove extra >

webcomponents/webcomponents.org,andymutton/beta,webcomponents/webcomponents.org,webcomponents/webcomponents.org,andymutton/beta,andymutton/beta,customelements/v2,andymutton/v2,customelements/v2,andymutton/v2,andymutton/v2,andymutton/v2,customelements/v2,andymutton/beta,customelements/v2