Update dependency mysql2 to v3 [SECURITY]

Author: renovate[bot]

package.json

@@ -30,7 +30,7 @@
     "hasha": "^5.1.0",
     "lodash": "^4.17.15",
     "moment": "^2.24.0",
-    "mysql2": "^2.1.0",
+    "mysql2": "^3.0.0",
     "node-geocoder": "^4.0.0",
     "pg-promise": "^10.3.5",
     "pug": "^3.0.0",