Log Message:
devel/ruby-msgpack: update to 1.5.6

2022-08-23 1.5.6:

* No actual code change, just re-release the `java` version properly.

2022-08-22 1.5.5:

* Fix a segfault when GC triggers inside a recursive extension.

2022-07-25 1.5.4:

* Fix a segfault when deserializing empty symbol (`:""`).
* Improve compilation flags to not strip debug symbols.

2022-05-30 version 1.5.3:

* Fix deduplication of empty strings when using the `freeze: true` option.
* Use `rb_hash_new_capa` when available (Ruby 3.2) for improved performance
  when parsing large hashes.

2022-05-27 version 1.5.2:

* Fix bug about unpacking ext type objects with the recursive option

2022-04-07 version 1.5.1:

* Fix bug about packing/unpacking ext type objects with the recursive option

2022-04-06 version 1.5.0:

* Add recursive option on Factory#register_type to operate Packer/Unpacker
  manually
* Add oversized_integer_extension option on Factory#register_type to
  pack/unpack bigint using ext types
* Add Factory#pool method and Factory::Pool class to provide pooled Packer
  and Unpacker instances