Errors: add active_support require to config.ru (#646)
Errors: add active_support require to config.ru (#646)

This adds an additional `active_support` require to `config.ru`. This
should (hopefully) fix [this issue][is] where an error is thrown when
loading `Delayed::Job`.

[is]: https://github.com/stringer-rss/stringer/issues/644
dperson/stringer,dperson/stringer,dperson/stringer,nibble/stringer,nibble/stringer,nibble/stringer,dperson/stringer,nibble/stringer