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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-FOLLOWREDIRECTS-2396346

package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "ag-grid-vue": "^17.0.0",
-    "axios": "^0.21.1",
+    "axios": "^0.16.1",
     "connect-history-api-fallback": "^1.3.0",
     "debounce": "^1.0.0",
     "express": "^4.16.1",