Log Message:
devel/ruby-tins: udpate to 1.20.2

* 2018-11-14 Release 1.20.2
 - Fix ~x options
* 2018-11-14 Release 1.20.1
 - Add disabling boolean options in Tins::GO#go method.
* 2018-11-14 Release 1.20.0
 - Support default arguments in Tins::GO#go method.
* 2018-11-07 Release 1.19.0
 - Allow annotations without arguments
* 2018-11-02 Release 1.18.0
 - `thread_local` and `thread_global` with default block
* 2018-10-15 Release 1.17.0
 - Add Tins::TempIO::Enum class to wrap `temp_io` into Enumerator.