Bump bootstrap from 3.3.7 to 3.4.1

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 3.3.7 to 3.4.1.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](twbs/bootstrap@v3.3.7...v3.4.1)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -10,7 +10,7 @@
     "babelify": "^6.1.1",
     "backbone": "^1.2.0",
     "backbone-model-file-upload": "^1.0.0",
-    "bootstrap": "^3.3.4",
+    "bootstrap": "^3.4.1",
     "bootstrap-datepicker": "^1.6.0",
     "brfs": "^1.4.0",
     "browserify": "^10.2.1",

yarn.lock

@@ -622,9 +622,9 @@ bootstrap-datepicker@^1.6.0:
   dependencies:
     jquery ">=1.7.1"
 
-bootstrap@^3.3.4:
-  version "3.3.7"
-  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-3.3.7.tgz#5a389394549f23330875a3b150656574f8a9eb71"
+bootstrap@^3.4.1:
+  version "3.4.1"
+  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-3.4.1.tgz#c3a347d419e289ad11f4033e3c4132b87c081d72"
 
 brace-expansion@^1.0.0:
   version "1.1.6"