test: actually use button detector

Author: faretek1

test/main.gs

@@ -1,8 +1,11 @@
 costumes "blank.svg";
 
 %include inflator/assert
-%include inflator/string
+%include inflator/button_detector
 
 onflag {
-    assert_eq uppercase("test..?"), "TEST..?", "uppercase";
+    show result;
+    forever {
+        result = button_detector();
+    }
 }