Log Message:
devel/ruby-msgpack: update to 1.2.10

2019-04-19 version 1.2.10:

* Optimze MessagePack.unpack not to copy source string

2019-03-13 version 1.2.9:

* Hotfix release only for JRuby: 1.2.8-java was built incorrectly

2019-03-11 version 1.2.8:

* Fix a regression that MessagePack#unpack raises error if IO is assigned as the \ 
(only) argument
* Improve compatibility that MessagePack#pack returns nil if IO is assigned as \ 
2nd argument

2019-03-01 version 1.2.7:

* Add Packer#write_bin and Packer#write_bin_header methods