JSON implementation for Ruby Files

What's Changed

• 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.

Full Changelog: https://github.com/ruby/json/compare/v2.16.0...v2.17.0