build(deps): bump multi_json from 1.20.1 to 1.21.0

[dependabot]

Bumps multi_json from 1.20.1 to 1.21.0.

Release notes

Sourced from multi_json's releases.

v1.21.0

Full Changelog: sferik/multi_json@v1.20.1...v1.21.0

Changelog

Sourced from multi_json's changelog.

[1.21.0]

Every deprecation introduced here will be removed in 2.0.0. Upgrade to 1.21.0, run your app or test suite with ruby -W:deprecated to surface the warnings, migrate each call site to the new canonical names, then pin ~> 2.0 once 2.0.0 ships.

Added

• Rename the MultiJson constant to MultiJSON (all-caps) to match the project name, Ruby stdlib JSON, and the all-caps treatment of the JSON acronym across other languages. The legacy MultiJson constant continues to work as a thin delegator via method_missing and const_missing, so MultiJson.parse(...), MultiJson::Adapters::Oj, and rescue MultiJson::ParseError all resolve to their MultiJSON counterparts.
• Add MultiJSON.parse and MultiJSON.generate as the new canonical names for the primary parse and generate methods, matching Ruby stdlib JSON.parse / JSON.generate, the JSON spec (RFC 8259), and sister library MultiXml.
• Add MultiJSON.parse_options / MultiJSON.parse_options= and MultiJSON.generate_options / MultiJSON.generate_options= as the new canonical option setters.
• Accept symbolize_names: as the canonical option name matching Ruby stdlib's JSON.parse(str, symbolize_names: true). The deprecated symbolize_keys: option continues to work and emits a one-time warning when passed at any of the three option layers (call-site, MultiJSON.parse_options=, adapter defaults :load).
• Replace the two-adapter Benchmark.ips smoke test in benchmark.rb with a full adapter comparison matrix (parse + dump across nine workloads) and promote it to a top-level rake benchmark task. A new --verify-preference flag asserts that MultiJSON::AdapterSelector::ADAPTERS matches the observed throughput ranking, with a 10% tolerance for adjacent ties; CI runs it on every push so the ordering can't silently drift.

Changed

• Reorder MultiJSON::AdapterSelector::ADAPTERS so the JSON gem is tried before fast_jsonparser/oj/yajl on MRI and TruffleRuby, matching the throughput ranking in the bundled benchmark suite on Ruby 3.4+. The hash is split per platform so JRuby still prefers jr_jackson. Affects auto-detection only when more than one of those adapters is loaded; explicitly selecting an adapter with MultiJSON.use(:adapter) is unchanged.

Deprecated

• The MultiJson constant in favor of MultiJSON.
• MultiJSON.load in favor of MultiJSON.parse.
• MultiJSON.dump in favor of MultiJSON.generate.
• MultiJSON.load_options / MultiJSON.load_options= in favor of MultiJSON.parse_options / MultiJSON.parse_options=.
• MultiJSON.dump_options / MultiJSON.dump_options= in favor of MultiJSON.generate_options / MultiJSON.generate_options=.
• The :symbolize_keys parse option in favor of :symbolize_names.

All deprecated names continue to work and emit a one-time warning on first use. Warnings are tagged with Ruby's :deprecated category, so noisy apps can silence the whole set with Warning[:deprecated] = false and deprecation-aware tooling (ruby -W:deprecated, CI linters) picks them up. The old names will be removed in 2.0.

Commits

• 8339719 Version 1.21.0
• 2217775 Tag deprecation warnings as :deprecated and document the bridge in the README
• 6f6b756 Reorder ADAPTERS by benchmark throughput and verify the order in CI
• 72d3ea1 Add adapter benchmark suite as a rake task
• 112d0af Mirror stdlib JSON in the public API: MultiJSON, parse/generate, symbolize_names
• ddc802a Rewrite CHANGELOG in Keep a Changelog format
• d4c6fe1 Whitelist gemspec files instead of globbing all .md files
• c50c595 Fix flaky symbol-count tests that fail when GC reclaims symbols
• See full diff in compare view

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[dependabot]

Superseded by #5088.