fix(deps): update dependency openapi3-ts to v4

Author: renovate[bot]

package-lock.json

@@ -60,7 +60,7 @@
     "ajv": "^6.12.6",
     "aws-xray-sdk-core": ">=1.1.6",
     "lodash": "^4.17.21",
-    "openapi3-ts": "2.0.2",
+    "openapi3-ts": "4.5.0",
     "path-to-regexp": "^6.2.0",
     "qs": "^6.10.1",
     "traverse": "^0.6.7"