Also bump Android version code

Android's version code also needs to be bumped, as the beta is "live" now.

www/config.xml

@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='utf-8'?>
-<widget android-versionCode="28" defaultlocale="en" id="org.adaptit.adaptitmobile" ios-CFBundleVersion="1.2.1" version="1.2.0" xmlns="http://www.w3.org/ns/widgets" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:cdv="http://cordova.apache.org/ns/1.0" xmlns:gap="http://phonegap.com/ns/1.0">
+<widget android-versionCode="29" defaultlocale="en" id="org.adaptit.adaptitmobile" ios-CFBundleVersion="1.2.1" version="1.2.0" xmlns="http://www.w3.org/ns/widgets" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:cdv="http://cordova.apache.org/ns/1.0" xmlns:gap="http://phonegap.com/ns/1.0">
     <name short="Adapt It Mobile" xml:lang="en">Adapt It Mobile</name>
     <description xml:lang="en">
         An open source application for translating between related languages.