Bump version to 2.0.0

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: yangshun

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tree-node-cli",
-  "version": "1.6.0",
+  "version": "2.0.0",
   "description": "Lists the contents of directories in a tree-like format, similar to the Linux tree command.",
   "keywords": [
     "cli",
@@ -44,7 +44,8 @@
     "typecheck": "tsc --noEmit",
     "format": "oxfmt",
     "lint": "oxlint",
-    "test": "vitest run"
+    "test": "vitest run",
+    "prepublishOnly": "pnpm check && pnpm build"
   },
   "dependencies": {
     "cac": "^7.0.0",