Fix example so that it actually works with latest Rakudo.
Hack script to build earlier versions of Rakudo.
This should be integrated into the standard build script, or (more likely) these versions should be officially not-supported.
parse-json
* Add Perl 5 version of the test, which requires JSON::Tiny.
* Fix Perl 6 version, so that it actually runs on the latest Rakudo (may not run on earlier versions).
* Add --dump switch for testing: dumps the parsed JSON as a Perl structure.