fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BODYPARSER-7926860
- https://snyk.io/vuln/SNYK-JS-EXPRESS-7926867
- https://snyk.io/vuln/SNYK-JS-SEND-7926862
- https://snyk.io/vuln/SNYK-JS-SERVESTATIC-7926865

package.json

@@ -23,11 +23,11 @@
     "babel-loader": "^8.3.0",
     "babel-preset-env": "^1.7.0",
     "babel-preset-react": "^6.24.1",
-    "body-parser": "^1.20.2",
+    "body-parser": "^1.20.3",
     "connect-mongo": "^4.6.0",
     "cross-env": "^7.0.3",
     "css-loader": "^5.2.7",
-    "express": "^4.18.2",
+    "express": "^4.21.0",
     "express-graphql": "^0.12.0",
     "express-session": "^1.17.3",
     "graphql": "^15.8.0",