Bump version

Author: veloce

config.xml

@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='utf-8'?>
-<widget android-versionCode="400800" id="org.lichess.mobileapp" version="4.8.0" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0">
+<widget android-versionCode="400900" id="org.lichess.mobileapp" version="4.9.0" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0">
     <name>lichess</name>
     <description>lichess.org mobile application</description>
     <author email="vincent.velociter@gmail.com" href="https://github.com/veloce/lichobile">Vincent Velociter</author>