Update documentation about the ghostscript version supported.

Author: NickNaso

README.md

@@ -79,7 +79,7 @@ Before installing Ghostscript4JS you need to assure you have the following prere
 
 * **Ghostscript** for your Operating System.
 
-## At moment Ghostscript4JS is fully compatible with Ghostscript version 9.19 and 9.25
+## At moment Ghostscript4JS is fully compatible with Ghostscript from version 9.19 to 9.50
 
 ## Linux