fix build things

package.json

@@ -6,7 +6,7 @@
   "types": "dist/index.d.ts",
   "scripts": {
     "lint": "eslint --fix .",
-    "build": "tsc",
+    "build": "node scripts/clean-dist.js && tsc",
     "gen:config-example": "npm run build && node dist/src/scripts/gen-config-example.js",
     "test": "jest --passWithNoTests",
     "dev": "npm run build && npm start",

scripts/clean-dist.js

+const fs = require('node:fs/promises');
+const path = require('node:path');
+
+async function cleanDistContents() {
+  const distPath = path.resolve(process.cwd(), 'dist');
+  await fs.mkdir(distPath, { recursive: true });
+  const entries = await fs.readdir(distPath, { withFileTypes: true });
+  await Promise.all(
+    entries.map((entry) =>
+      fs.rm(path.join(distPath, entry.name), {
+        recursive: true,
+        force: true,
+      }),
+    ),
+  );
+}
+
+cleanDistContents().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});