Update ruby-parsetree package to 2.2.0.

=== 2.2.0 / 2008-06-09

* 18 minor enhancements:

  * Added 1.9 and rubinius to multiruby skip list.
  * Added 1.9 fixes for SexpProcessor.
  * Added compatibility changes for regexp option values.
  * Added custom compact since Array#compact is hostile to subclasses.
  * Added some tests for wonky index edge cases. some commented out.
  * Added test changes for 1.9 and r2r changes. Esp fixed regexp differences.
  * Added tests for dasgn, proc arities,
  * Added/updated some tests for ruby_parser.
  * Changed tests to default to nil for verbose.
  * Fixed all assertions deprecated in miniunit.
  * Raises LoadError if incompatible ruby, allows fallback to ruby_parser.
  * Removed Unified's rewrite_fbody and moved up into defn... not sure about that.
  * Removed argscat rewriter from unified_ruby.rb
  * Renamed shadowed variable name.
  * Reworked parse_tree_for_(method|string) to take optional verbose arg.
  * Started removing ending newlines from pt_testcase.rb.
  * Uncommented all commented out tests. ruby_parser must not be a pansy.
  * Updated rakefile for new hoe abilities.

* 3 bug fixes:

  * Fixed 1.8.[45] wrt dasgn_curr declaration removal.
  * Fixed pt_testcase bug.
  * Fixes for colon2/3 in class/module/cdecls.


(taca)