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src: fix json utils escapes for U+000B

Rodrigo Muino Tomonari requested to merge github/fork/legendecas/issue-43193 into master

According to the https://www.ecma-international.org/wp-content/uploads/ECMA-404_2nd_edition_december_2017.pdf section 9 String, there are only the following two-character escape sequences:

  • \" represents the quotation mark character (U+0022).
  • \\ represents the reverse solidus character (U+005C).
  • \/ represents the solidus character (U+002F).
  • \b represents the backspace character (U+0008).
  • \f represents the form feed character (U+000C).
  • \n represents the line feed character (U+000A).
  • \r represents the carriage return character (U+000D).
  • \t represents the character tabulation character (U+0009).

\v is not one of them. So it should be escaped with hexadecimal sequence.

Fixes: https://github.com/nodejs/node/issues/43193

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