feat: export RegExpSyntaxError

[ArnaudBarre]

This allows to safely access the index of the error in a try catch

[RunDevelopment]

This would also export the public constructor of RegExpSyntaxError, which takes the internal type RegExpValidatorSourceContext. So this PR would also indirectly export RegExpValidatorSourceContext (e.g. via ConstructorParameters<typeof RegExpSyntaxError>[0]).

[ota-meshi]

Yeah, I think we need to change the constructor to a factory method and not export the factory method from index.ts.

like:

export class RegExpSyntaxError extends SyntaxError {
    public index: number
}

export function newRegExpSyntaxError(
      srcCtx: RegExpValidatorSourceContext,
      flags: { unicode: boolean; unicodeSets: boolean },
      index: number,
      message: string,
  ): RegExpSyntaxError {
  // ...
}

[ArnaudBarre]

Sorry the delay, I've updated the PR

[ota-meshi]

LGTM!

[github-actions]

🎉 This PR is included in version 4.10.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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