added in file list

Author: lohanidamodar

src/SDK/Language/Dart.php

@@ -281,6 +281,12 @@ public function getFiles()
                 'template'      => '/dart/lib/client.dart.twig',
                 'minify'        => false,
             ],
+            [
+                'scope'         => 'default',
+                'destination'   => '/lib/exception.dart',
+                'template'      => '/dart/lib/exception.dart.twig',
+                'minify'        => false,
+            ],
             [
                 'scope'         => 'default',
                 'destination'   => '/lib/{{ language.params.packageName }}.dart',