Bump version 0.4.0

Author: landrok

README.md

@@ -24,7 +24,7 @@ ________________________________________________________________________
 Requirements
 ------------
 
-NumPhp supports PHP 5.6, 7.0, 7.1, 7.2, 7.3, and 7.4.
+NumPhp supports PHP 7.2, 7.3 7.4 and 8.0.
 
 ________________________________________________________________________