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 ">=".
Previously, the angular-touch library provided by AngularJS was used to
allow click interactions with UI components to work on touch devices
without an uncomfortable ~300ms delay. From AngularJS 1.7.x onward, this
feature of angular-touch is no longer present:
https://docs.angularjs.org/guide/migration#ngtouch
This should be OK - modern browsers will now recognize applications
aimed at touch support via the use of the "viewport" meta tag (which we
use), removing our original need for angular-touch. The same goes for
IE10+.
Michael Jumper