small update to swiftlint, xcode's built-in refactoring does the oppo…

…site of what trailing-whitespace attempts to mitigate, leading to so many errors for no reason

.swiftlint.yml

@@ -4,6 +4,7 @@ disabled_rules:
   - function_body_length
   - file_length
   - cyclomatic_complexity
+  - trailing_whitespace
 
 excluded:
   - .build