Bump ruby_parser from 2.3.1 to 3.21.0 in /examples/barley

[dependabot]

Bumps ruby_parser from 2.3.1 to 3.21.0.

Changelog

Sourced from ruby_parser's changelog.

=== 3.21.0 / 2024-01-15

• 18 minor enhancements:

  • (internal) Added simple RubyLexer#comment.
  • (internal) Removed RubyLexer#comments and #ignore_body_comments.
  • (internal) Removed RubyParser#comments.
  • (internal) Renamed files from lib/ruby##_parser.* to lib/ruby_parser##.*
  • (internal) Renamed lib/ruby3_parser.yy to lib/ruby_parser3.yy
  • (internal) Renamed lib/ruby_parser.yy to lib/ruby_parser2.yy
  • Added tentative 3.2 support. (torrocus)
  • Made rake compare a multitask (28s -> 10s!!).
  • Made rake compare depend on generate (from clean: 28s -> 18s).
  • No longer package versioned .y files.
  • Overhaul of parser/lexer comment processing.
  • Parser productions for k_class/k_module/k_def carry their comment with them.
  • Restructured build tasks to utilize Hoe's .yy support! 8.5s -> 1.2s!!!
  • RubyParser new_(class|module|defn|defs) handle comment processing via sexp.
  • RubyParser new_(class|module|defn|defs) handle normalizing production sexps.
  • RubyParser#next_token clears out lexer's comment when applicable.
  • Simplified parser productions for defn_head, defs_head. No more normalizing.
  • Updated rake compare steps for lrama in ruby 3.3+.

• 6 bug fixes:

  • Cleaned out cruft from rake compare code.
  • Fixed compare/normalize.rb for lrama differences.
  • Made parser task depend on isolate task to pick up racc generator.
  • Made racc a runtime dependency (was dev only) now that ruby 3.3 doesn't ship with the racc runtime. (wildmaples)
  • Updated README.rdoc updating instructions to match current filenames.
  • Updated compare versions and added 3.3.

=== 3.20.3 / 2023-07-11

• 2 minor enhancements:

  • Added Parser#in_argdef and integrated into 3.x parsers.
  • Improved tools/munge.rb to handler MRI 3.2 output

• 2 bug fixes:

  • Fixed process_dots to properly deal with paren-less forward_args. (eric1234)
  • Fixed tools/ripper.rb to properly print ripper sexp at the end

=== 3.20.2 / 2023-06-06

• 1 bug fix:

  • 3.2: fixed parsing of f(*) and f(**). (agrobbin)

... (truncated)

Commits

• b07cac0 prepped for release
• dda9728 + Made rake compare depend on generate (from clean: 28s -> 18s).
• 33753ca + Added tentative 3.2 support. (torrocus)
• 2dc7171 + Restructured build tasks to utilize Hoe's .yy support! 8.5s -> 1.2s!!!
• f59a6b0 - Made racc a runtime dependency (was dev only) now that ruby 3.3 doesn't shi...
• 349afad Fixed clean task from previous commit. Removed some cruft in Rakefile.
• b48b979 + (internal) Renamed lib/ruby_parser.yy to lib/ruby_parser2.yy
• 8f419fd + Overhaul of parser/lexer comment processing.
• fe1286f prepped for release
• 744c910 + Added Parser#in_argdef and integrated into 3.x parsers.
• Additional commits viewable in compare view

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