fix: frontend/package.json & frontend/package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-1038255

frontend/package-lock.json

@@ -2536,9 +2536,9 @@
       "integrity": "sha512-zg7Hz2k5lI8kb7U32998pRRFin7zJlkfezGJjUc2heaD4Pw2wObakCDVzkKztTm/Ln7eiVvYsjqak0Ed4LkMDA=="
     },
     "axios": {
-      "version": "0.21.0",
-      "resolved": "https://registry.npmjs.org/axios/-/axios-0.21.0.tgz",
-      "integrity": "sha512-fmkJBknJKoZwem3/IKSSLpkdNXZeBu5Q7GA/aRsr2btgrptmSCxi2oFjZHqGdK9DoTil9PIHlPIZw2EcRJXRvw==",
+      "version": "0.21.1",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-0.21.1.tgz",
+      "integrity": "sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==",
       "requires": {
         "follow-redirects": "^1.10.0"
       }

frontend/package.json

@@ -11,7 +11,7 @@
     "@testing-library/jest-dom": "^4.2.4",
     "@testing-library/react": "^9.5.0",
     "@testing-library/user-event": "^7.2.1",
-    "axios": "^0.21.0",
+    "axios": "^0.21.1",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
     "react-router-dom": "^5.2.0",