feat: lock node version as in api-js

Author: AlexKushnir1

package.json

@@ -25,7 +25,7 @@
     "@ava/typescript": "^2.0.0",
     "@types/bn.js": "^5.1.0",
     "@types/fs-extra": "^9.0.12",
-    "@types/node": "^20.0.0",
+    "@types/node": "20.0.0",
     "@types/rimraf": "^3.0.1",
     "ava": "^4.0.1",
     "husky": "^7.0.1",