fix(deps): update dependency express to v4.18.3

Author: renovate[bot]

mock-server/package-lock.json

@@ -35,7 +35,7 @@
     "commander": "4.1.1",
     "debug": "4.3.4",
     "errorhandler": "1.5.1",
-    "express": "4.18.1",
+    "express": "4.18.3",
     "json-schema-ref-parser": "9.0.9",
     "js-yaml": "3.14.1",
     "morgan": "1.10.0",