Stablizes transforms of class property arrow functions

[sfrieson]

Closes #134, an issue I ran into when trying to migrate multiple repos that resulted in broken code in certain files.

I am not entirely sure if this is the best way to make the fix, so any pointers there would be appreciated. The fix is working for a minimal test case (in the test suite) as well as on my code base leaving the syntax in place and removing 15 of 392 @ts-expect-errors.

I have seen cases where white space can get messed up as mentioned in the comment for shouldReplace.

Willing to work towards a different solution is there is a better one.

[edsrzf]

Thanks, I think this looks like a promising fix. I will take a closer look over the weekend. I've also found another issue or two I introduced in #127 that I will aim to fix.

[pmusiala]

Is it possible to merge it anytime soon?