📌 pin class-transformer version

the plugin currently depends on the internal structure
of class-transformer to re-implement stackable Expose decorator

related issues:
typestack/class-transformer#1259, #100

Author: momocow

package.json

@@ -71,7 +71,7 @@
     "webpack": "^5.75.0"
   },
   "dependencies": {
-    "class-transformer": "^0.5.1",
+    "class-transformer": "0.5.1",
     "class-validator": "^0.14.0",
     "node-fetch": "^2.6.9",
     "p-limit": "^3.1.0",