fix: add "node" to compilerOptions.types

Author: dmitryusenko

packages/tfjs-node-helpers/tsconfig.lib.json

@@ -3,7 +3,7 @@
   "compilerOptions": {
     "outDir": "../../dist/out-tsc",
     "declaration": true,
-    "types": [],
+    "types": ["node"],
     "lib": ["es2018"]
   },
   "include": ["**/*.ts"],