Update SQL Version Call

This is causing an issue for Postgres, when you select `version()`, its returning the result as `version`. Setting the `as` on the statement fixes this issue.

src/Http/Controllers/VersionController.php

@@ -31,8 +31,8 @@ private function getDatabase()
             return 'Unkown';
         }
 
-        $results = DB::select(DB::raw("select version()"));
+        $results = DB::select(DB::raw("select version() as version"));
 
-        return $results[0]->{'version()'};
+        return $results[0]->version;
     }
 }