Log Message:
devel/ruby-msgpack: update to 1.3.1

Update ruby-msgpack to 1.3.1.

2019-08-05 version 1.3.1:

* Fix timestamp ext type bug about timestamps with seconds larger than 32bit int \ 
(after 2106-02-07 06:28:16 UTC)

2019-06-20 verison 1.3.0:

* Add timestamp ext type (id:-1) support