Add bower 1.8.3, remove bower 1.8.2
Add bower 1.8.3, remove bower 1.8.2

source url: https://registry.npmjs.org/bower/-/bower-1.8.3.tgz
source sha256: b556160c4ada83f1c9bb4f12d32b7f8a7a8609d75384e963f3d145eaef43b8a2

[#156354238]

cloudfoundry-community/asp.net5-buildpack