update test sample

src/index.ts

@@ -1 +1,3 @@
-console.log('heeee');
+
+
+export { default as sample } from "./sample"

src/sample.ts

@@ -0,0 +1,11 @@
+const power = (n? : number) : number | undefined => {
+    if( typeof n === "undefined" || n === null){
+        return  undefined
+    }
+    if(typeof n !== "number"){
+        return undefined
+    }
+    return Math.pow(n, 2)
+}
+
+export default power