Bump bootstrap from 4.5.3 to 4.6.0

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 4.5.3 to 4.6.0.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](twbs/bootstrap@v4.5.3...v4.6.0)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -44,7 +44,7 @@
     "autosize": "^4.0.2",
     "backbone": "^1.4.0",
     "blueimp-md5": "^2.18.0",
-    "bootstrap": "^4.5.3",
+    "bootstrap": "^4.6.0",
     "camelcase": "^6.2.0",
     "clipboard": "^2.0.6",
     "core-js": "^3.8.2",