update bootstrap-sass version

Author: viralsolani

package-lock.json

@@ -12,7 +12,7 @@
   },
   "devDependencies": {
     "axios": "^0.18",
-    "bootstrap-sass": "3.3.7",
+    "bootstrap-sass": ">=3.4.1",
     "cross-env": "^5.1",
     "font-awesome": "^4.7.0",
     "jquery": "^3.4.0",