Prep 4.2.0-beta.1 release \o/

Author: lcharette

app/defines.php

@@ -9,7 +9,7 @@
 namespace UserFrosting;
 
 // Some standard defines
-define('UserFrosting\VERSION', '4.2.0-alpha.2');
+define('UserFrosting\VERSION', '4.2.0-beta.1');
 define('UserFrosting\DS', '/');
 define('UserFrosting\PHP_MIN_VERSION', '5.6');
 define('UserFrosting\PHP_RECOMMENDED_VERSION', '7.1');