Per [the new exported dependency guidelines](https://groups.google.com/a/dartlang.org/forum/#!topic/misc/6PjWjxveQjQ), the dependency constraint for `oauth2` should be narrowed to `>=0.9.3 <0.9.4`.
Per the new exported dependency guidelines, the dependency constraint for
oauth2should be narrowed to>=0.9.3 <0.9.4.