Log Message:
Updated p5-JSON-XS to 3.04.

3.04 Thu Aug 17 04:30:47 CEST 2017
	- change exponential realloc algorithm on encoding and string decoding to be
          really exponential (this helps slow/debugging allocators such as libumem)
          (reported by Matthew Horsfall).
        - string encoding would needlessly overallocate output space
          (testcase by Matthew Horsfall).
        - be very paranoid about extending buffer lengths and croak if buffers \ 
get too large,
          which might (or might not) improve security.
	- add cbor-packed type to json_xs.
        - switch from YAML to YAML::XS in json_xs, as YAML is way too buggy and \ 
outdated.