Remove ruby 2.7 deprecation warning
Remove ruby 2.7 deprecation warning

```
/path/to/formtastic-f95dddae2fe5/lib/formtastic/i18n.rb:26: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
/path/to/i18n-1.8.2/lib/i18n.rb:195: warning: The called method `translate' is defined here
```

justinfrench/formtastic,justinfrench/formtastic,justinfrench/formtastic