The default caret version notation that is already well-established in
the NPM community should be used except where there is reason not to.
Here, it makes sense to use the caret for all dependencies except:
1. "google-closure-compiler", which does not use semantic versioning
and does not guarantee a compatible API. We cannot know that a new
release is expected to be compatible and thus must specify an exact
version.
2. "blob-polyfill", which does not use semantic versioning BUT must
provide a compatible API by its own nature (it is a polyfill for an
API defined by a W3C standard). Any current, stable release should be
OK for "blob-polyfill", hence ">=".
Michael Jumper
b90a083fe1