Bump json from 1.7.4 to 2.3.1 in /edx_specs

[dependabot]

Bumps json from 1.7.4 to 2.3.1.

Changelog

Sourced from json's changelog.

2020-06-30 (2.3.1)

• Spelling and grammar fixes for comments. Pull request #191 by Josh Kline.
• Enhance generic JSON and #generate docs. Pull request #347 by Victor Shepelev.
• Add :nodoc: for GeneratorMethods. Pull request #349 by Victor Shepelev.
• Baseline changes to help (JRuby) development. Pull request #371 by Karol Bucek.
• Add metadata for rubygems.org. Pull request #379 by Alexandre ZANNI.
• Remove invalid JSON.generate description from JSON module rdoc. Pull request #384 by Jeremy Evans.
• Test with TruffleRuby in CI. Pull request #402 by Benoit Daloze.
• Rdoc enhancements. Pull request #413 by Burdette Lamar.
• Fixtures/ are not being tested... Pull request #416 by Marc-André Lafortune.
• Use frozen string for hash key. Pull request #420 by Marc-André Lafortune.
• Added :call-seq: to RDoc for some methods. Pull request #422 by Burdette Lamar.
• Small typo fix. Pull request #423 by Marc-André Lafortune.

2019-12-11 (2.3.0)

• Fix default of create_additions to always be false for JSON(user_input) and JSON.parse(user_input, nil). Note that JSON.load remains with default true and is meant for internal serialization of trusted data. [CVE-2020-10663]
• Fix passing args all #to_json in json/add/*.
• Fix encoding issues
• Fix issues of keyword vs positional parameter
• Fix JSON::Parser against bigdecimal updates
• Bug fixes to JRuby port

2019-02-21 (2.2.0)

• Adds support for 2.6 BigDecimal and ruby standard library Set datetype.

2017-04-18 (2.1.0)

• Allow passing of decimal_class option to specify a class as which to parse JSON float numbers.

2017-03-23 (2.0.4)

• Raise exception for incomplete unicode surrogates/character escape sequences. This problem was reported by Daniel Gollahon (dgollahon).
• Fix arbitrary heap exposure problem. This problem was reported by Ahmad Sherif (ahmadsherif).

2017-01-12 (2.0.3)

• Set required_ruby_version to 1.9
• Some small fixes

2016-07-26 (2.0.2)

Commits

• 0951d77 Bump version to 2.3.1
• ddc29e2 Merge pull request #429 from flori/remove-generate-task-for-gemspec
• cee8020 Removed gemspec task from default task on Rakefile
• 9fd6371 Use VERSION file instead of hard-coded value
• dc90bcf Removed explicitly date field in gemspec, it will assign by rubygems.org
• 4c11a40 Removed task for json_pure.gemspec
• e794ec9 Merge pull request #426 from marcandre/indent
• 7cc9301 Merge pull request #428 from marcandre/change_fix
• 9e2a1fb Make changes more precise #424
• f8fa987 Merge pull request #424 from marcandre/update_changes
• Additional commits viewable in compare view

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