fix: replace lone surrogates in draft-js content

[mattkrick]

Description

Fixed by calling toWellFormed() on the string. It still isn't a part of typescript's lib though 😠 https://github.com/microsoft/TypeScript/issues/55543

We can't validate the entire incoming payload because the lone surrogate is inside quotes inside the string, e.g. the validator is looking for \udc4d but it only sees "\udc4d" so it doesn't fix it. This makes sense because if someone wanted to say "I have an issue anytime the character \udc4d comes up" we wouldn't want that to be invalid.

I also bumped all the typescript packages & libs thinking that a newer version would have toWellFormed in it. Unrelated, but it's a small PR so i left it.

Demo

[If possible, please include a screenshot or gif/video, it'll make it easier for reviewers to understand the scope of the changes and how the change is supposed to work. If you're introducing something new or changing the existing patterns, please share a Loom and explain what decisions you've made and under what circumstances]

Testing scenarios

• [ ] start a retro, type in :+ hit enter to create the reflection, click the thumbs up emoji in the menu, hit backspace to remove the lower surrogate so the emoji turns into a replacement char. submit it
• [ ] backup the reflections table