Update Bootstrap version

Author: angelocordon

package-lock.json

@@ -22,7 +22,7 @@
     "@material-ui/core": "^3.9.1",
     "@material-ui/icons": "^3.0.2",
     "bcrypt": "3.0.2",
-    "bootstrap": "4.1.3",
+    "bootstrap": ">=4.3.1",
     "bootswatch": "^4.2.1",
     "faker": "^3.1.0",
     "lodash": "4.17.11",