Log Message:
Update ruby-dnsruby to 1.60.1.

## v1.60.1

* DNSSEC validation switched OFF by default (but can still be switched on)
* Add APL RR support (thanks Manabu Sonoda)
* Various test fixes (thanks Keith Bennett)
* 'include' issues fixed (thanks Keith Bennett!)
* Fixnum replacement (thanks Keith Bennett)
* Zone transfer fixes (thanks Manabu Sonoda)
* Name decoding fix
* MX record passing error now raised
* CAA RR support (thanks Richard Luther)
* TLSA RR support (thanks Manabu Sonoda)