Log Message:
Update p5-JSON to 2.12.

2.12  Wed Jul 16 11:14:35 2008
	[JSON]
	- made compatible with JSON::XS 2.22

	[JSON::PP]
	- fixed the incremental parser in negative nest level
	    (pointed and patched by Yuval Kogman)

2.11  Tue Jun 17 14:30:01 2008
	[JSON::PP]
	- fixed the decoding process which checks number.
	    regarded number like chars in Unicode (ex. U+FF11) as [\d].
	- enhanced error messages compatible to JSON::XS.