Unpin CDK CLI in devDependencies (#615)

Author: SH4DY

examples/cdk/package.json

@@ -17,7 +17,7 @@
   "devDependencies": {
     "@types/jest": "^26.0.10",
     "@types/node": "17.0.10",
-    "aws-cdk": "2.0.0",
+    "aws-cdk": "^2.0.0",
     "esbuild": "^0.14.23",
     "jest": "^26.4.2",
     "ts-jest": "^26.2.0",