update to Bootstrap 3.4.1 to fix vulnerability alert

Author: Ghislain Beaulac

package.json

@@ -95,7 +95,7 @@
     "@types/moment": "^2.13.0",
     "@types/node": "^10.12.15",
     "@types/text-encoding-utf-8": "^1.0.1",
-    "bootstrap": "3.4.0",
+    "bootstrap": "3.4.1",
     "codelyzer": "~4.5.0",
     "copyfiles": "^2.1.0",
     "cross-env": "^5.2.0",