chore(deps): bump typescript to v6 @W-20496487

[wjhsf]

Details

TypeScript does not follow semver; any version bump can introduce changes that cause code to fail type checking. As a library, we want to avoid unexpected errors due to our version of TypeScript not matching that of our users. As such, we only change our version during a major release.

Because we rarely do major releases, I opted to jump to TypeScript v6, even though it's only a preview release at the moment. It's just our local dev version, and I don't anticipate there being any major changes that would somehow break our users when we switch to the full release.

Does this pull request introduce a breaking change?

• 😮‍💨 No, it does not introduce a breaking change.
• 💔 Yes, it does introduce a breaking change.

Does this pull request introduce an observable change?

• 🤞 No, it does not introduce an observable change.
• 🔬 Yes, it does include an observable change.

GUS work item