[Security] Bump json from 1.8.3 to 2.3.0

[dependabot-preview]

Bumps json from 1.8.3 to 2.3.0.

Changelog

Sourced from json's changelog.

Changes

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)

• Specify required_ruby_version for json_pure.
• Fix issue #295 failure when parsing frozen strings.

2016-07-01 (2.0.1)

• Fix problem when requiring json_pure and Parser constant was defined top
  level.
• Add RB_GC_GUARD to avoid possible GC problem via Pete Johns.
• Store current_nesting on stack by Aaron Patterson.

2015-09-11 (2.0.0)

• Now complies to newest JSON RFC 7159.
• Implements compatibiliy to ruby 2.4 integer unification.
• Drops support for old rubies whose life has ended, that is rubies < 2.0.
  Also see https://www.ruby-lang.org/en/news/2014/07/01/eol-for-1-8-7-and-1-9-2/
• There were still some mentions of dual GPL licensing in the source, but JSON
  has just the Ruby license that itself includes an explicit dual-licensing
  clause that allows covered software to be distributed under the terms of
  the Simplified BSD License instead for all ruby versions >= 1.9.3. This is
  however a GPL compatible license according to the Free Software Foundation.
  I changed these mentions to be consistent with the Ruby license setting in
  the gemspec files which were already correct now.

Commits

• 92cf5c4 v2.3.0
• 579ae85 Add some more recent jruby
• acabfeb Make tests green on jruby
• c194360 Update travis config
• 49317c1 Ignore log files
• d84439f Merge pull request #391 from headius/prep_2.3.0
• 38f68d1 Bump versions for 2.3.0.
• 40524a9 Merge pull request #390 from flori/relax-test-unit
• 87379e6 relax test-unit version for old ruby
• 05de02f Merge branch 'zenspider-zenspider/ruby-2.7'
• Additional commits viewable in compare view

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[dependabot-preview]

We've just been alerted that this update fixes a security vulnerability:

Sourced from The Ruby Advisory Database.

json Gem for Ruby Unsafe Object Creation Vulnerability (additional fix)
There is an unsafe object creation vulnerability in the json gem bundled with
Ruby. This vulnerability has been assigned the CVE identifier CVE-2020-10663.
We strongly recommend upgrading the json gem.

Details

When parsing certain JSON documents, the json gem (including the one bundled
with Ruby) can be coerced into creating arbitrary objects in the target system.

... (truncated)

Patched versions: [">= 2.3.0"]