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](https://github.com/twbs/bootstrap/compare/v3.3.7...v3.4.1)

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

package.json

@@ -70,7 +70,7 @@
     "typescript": "^4.1.3"
   },
   "dependencies": {
-    "bootstrap": "3.3.7",
+    "bootstrap": "3.4.1",
     "classnames": "^2.2.5",
     "create-react-class": "^15.6.3",
     "font-awesome": "4.6.3",