Update json requirement from 2.18.0 to 2.18.1

[dependabot]

Updates the requirements on json to permit the latest version.

Release notes

Sourced from json's releases.

v2.18.1

What's Changed

• Fix a potential crash in very specific circumstance if GC triggers during a call to to_json without first invoking a user defined #to_json method.

Full Changelog: ruby/json@v2.18.0...v2.18.1

Changelog

Sourced from json's changelog.

2026-02-03 (2.18.1)

• Fix a potential crash in very specific circumstance if GC triggers during a call to to_json without first invoking a user defined #to_json method.

2025-12-11 (2.18.0)

• Add :allow_control_characters parser options, to allow JSON strings containing unescaped ASCII control characters (e.g. newlines).

2025-12-04 (2.17.1)

• Fix a regression in parsing of unicode surogate pairs (\uXX\uXX) that could cause an invalid string to be returned.

2025-12-03 (2.17.0)

• Improve JSON.load and JSON.unsafe_load to allow passing options as second argument.
• Fix the parser to no longer ignore invalid escapes in strings. Only \", \\, \b, \f, \n, \r, \t and \u are valid JSON escapes.
• Fixed JSON::Coder to use the depth it was initialized with.
• On TruffleRuby, fix the generator to not call to_json on the return value of as_json for Float::NAN.
• Fixed handling of state.depth: when to_json changes state.depth but does not restore it, it is reset automatically to its initial value. In particular, when a NestingError is raised, depth is no longer equal to max_nesting after the call to generate, and is reset to its initial value. Similarly when to_json raises an exception.

2025-11-07 (2.16.0)

• Deprecate JSON::State#[] and JSON::State#[]=. Consider using JSON::Coder instead.
• JSON::Coder now also yields to the block when encountering strings with invalid encoding.
• Fix GeneratorError messages to be UTF-8 encoded.
• Fix memory leak when Exception is raised, or throw is used during JSON generation.
• Optimized floating point number parsing by integrating the ryu algorithm (thanks to Josef Šimánek).
• Optimized numbers parsing using SWAR (thanks to Scott Myron).
• Optimized parsing of pretty printed documents using SWAR (thanks to Scott Myron).

2025-10-25 (2.15.2)

• Fix JSON::Coder to have one dedicated depth counter per invocation. After encountering a circular reference in JSON::Coder#dump, any further #dump call would raise JSON::NestingError.

2025-10-07 (2.15.1)

• Fix incorrect escaping in the JRuby extension when encoding shared strings.

2025-09-22 (2.15.0)

• JSON::Coder callback now receive a second argument to convey whether the object is a hash key.
• Tuned the floating point number generator to not use scientific notation as aggressively.

2025-09-18 (2.14.1)

... (truncated)

Commits

• 6ec6e7b Release 2.18.1
• fff25c9 fbuffer_append_str: assume string
• 79b6e16 Ensure Generator::State is kept on the stack
• 062fcdd Improve class JSON intro
• 1b276c8 Extract json_fast_memcpy16 for readability
• 643ee11 Use __builtin_memcpy, if available, to copy overlapping byte ranges in copy_r...
• 15eb40d Remove trailing spaces [ci skip]
• 73818b8 initialize search.chunk_end to silence a warning about it being potentially u...
• 86a5cce use a conditional to select SIMD implementation rather than pointer
• a51317c Directly write to the output buffer when converting UTF32 to UTF8.
• Additional commits viewable in compare view

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