Update broccoli dependencies to improve performance.

When the current version of broccoli-filter is used with a directory that contains symlinks
(like something from static-compiler or merge-trees), and kitchen-sink-helpers less than 0.2.5
is used, none of the symlinks can use cache (since we are comparing hashes of the symlinks
which are recreated for each built).
Merge pull request #2182 from rwjblue/update-broccoli-deps

Update broccoli dependencies to improve performance.