Upgrade bootstrap to 3.4.0 to fix CVE-2018-14041.
Upgrade bootstrap to 3.4.0 to fix CVE-2018-14041.

weldr/welder-web,jkozol/welder-web,jkozol/welder-web,jkozol/welder-web,weldr/welder-web,jkozol/welder-web,weldr/welder-web,weldr/welder-web