chore(npm-shrinkwrap): fix karma dependencies

Updating to karma 0.12.13 (in commit 408508ad2972d7f5cf131be37c87d206cf10a5b7)
caused `iit` and `ddescribe` to crash and disconnect the browser stopping the
test run.

It appears that the problem is with one of the dependencies of karma rather
than karma itself. At least one of the karma dependencies updated in line
with karma's dependencies' semver specifications but subtly changed their
behaviour to break karma.  Possibly this is related to chokidar, glob,
minimatch or fsevents.