Update vitest to 3.0.8.

I guess Claude had chosen a very old version initially. Whoops.

Also change `npm run test` command from `vitest` to `vitest run`, because otherwise the default is `watch` mode, which will just hang forever when Claude Code calls it. (I'm working on an upstream patch to vitest to make the default behavior be `run` when stdin is not a TTY.)

Author: kentonv

package.json

@@ -15,7 +15,7 @@
   },
   "scripts": {
     "build": "tsup",
-    "test": "vitest",
+    "test": "vitest run",
     "prepublishOnly": "npm run build"
   },
   "dependencies": {
@@ -24,6 +24,6 @@
   "devDependencies": {
     "tsup": "^8.4.0",
     "typescript": "^5.8.2",
-    "vitest": "^1.2.2"
+    "vitest": "^3.0.8"
   }
 }