update readme

Author: fbchen

README.md

@@ -5,6 +5,9 @@ Build flexible layouts with constraints, Similar to Android ConstraintLayout.
 No matter how complex the layout is and how deep the dependencies are, each child element of
 ConstraintLayout will only be measured once, This results in extremely high layout performance.
 
+Anyone who sends you a harassing message, you can send him Flutter code and use nested hell to rule
+him.
+
 # Feature
 
 1. build flexible layouts with constraints