fix: frontend/.snyk & frontend/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/SNYK-JS-LODASH-567746

frontend/package.json

@@ -58,7 +58,7 @@
     "vuex": "^3.1.1",
     "webpack-md5-hash": "0.0.6",
     "webpack-merge": "^4.2.1",
-    "snyk": "^1.316.1"
+    "snyk": "^1.321.0"
   },
   "snyk": true
 }