Internal: Bump version to alpha 4

Author: ywarnier

public/main/install/version.php

@@ -12,7 +12,7 @@
 return [
     'new_version' => '2.0.0',
     'new_version_status' => 'alpha',
-    'new_version_last_id' => '3',
+    'new_version_last_id' => '4',
     'new_version_stable' => false,
     'new_version_major' => true,
     'software_name' => 'Chamilo',