add relase call

go-converts/wasm.go

@@ -7,8 +7,14 @@ import "syscall/js"
 func ToBytes(v js.Value) []byte {
 	buf := make([]byte, v.Length(), v.Length())
 	for i := 0; i < v.Length(); i++ {
-		buf[i] = byte(v.Index(i).Int())
+		sv := v.Index(i)
+		buf[i] = byte(sv.Int())
 	}
 
 	return buf
 }
+
+// Free frees the value for GC
+func free(v js.Value) {
+	v.Call("_release_")
+}