update tsconfig

package.json

@@ -4,7 +4,7 @@
   "type": "module",
   "main": "./dist/index.js",
   "scripts": {
-    "build": "tsc"
+    "build": "tsc -p tsconfig.build.json"
   },
   "devDependencies": {
     "@types/bun": "latest",

tsconfig.build.json

@@ -0,0 +1,19 @@
+{
+    "compilerOptions": {
+        "target": "ES2020",
+        "module": "nodenext",
+        "moduleResolution": "NodeNext",
+        "outDir": "dist",
+        "rootDir": "src",
+
+        "allowSyntheticDefaultImports": true,
+        "esModuleInterop": true,  // ✅ important
+
+        "strict": true,
+        "skipLibCheck": true,
+        "noEmit": false,
+        "declaration": false,
+        "sourceMap": false
+    },
+    "include": ["src/index.ts"]
+}