This included removing some internal version constraints. It would be
nice if package A could say "use B@2.0.0" (when both have changed), but
when they're both in the release, we need to make a release that has a
B@2.0.0-rc in it, which doesn't match that constraint. Fortunately,
constraints aren't necessary within a release anyway.
This package will be installed by default for all new apps and packages.
Passing the {transpile:false} option to api.addFiles makes it possible for
a dependent package to specify that some files should not be processed
through babel-compiler.
