ci: fix dependencies

Author: bweigel

continous-integration/package-lock.json

@@ -35,6 +35,7 @@
   },
   "devDependencies": {
     "aws-cdk-lib": "^2.0.0",
+    "aws-cdk": "^2.38.1",
     "constructs": "^10.0.0",
     "@types/jest": "^26.0.14",
     "@types/node": "^14.11.5",
@@ -43,4 +44,4 @@
     "ts-jest": "^26.4.1",
     "typescript": "~4.0.3"
   }
-}
+}