Add support for more code conversion for migration

[seekshiva]

No description provided.

[zth]

This is great, thank you! Don't hesitate to add more if you find.

[zth]

@seekshiva is it ready to be merged?

[seekshiva]

@zth This was required to convert one of our internal repos into rescript. If we find more such cases while converting other repos, will raise more PRs in future.

That's it for now.

[seekshiva]

I also found that Js.Math.random_int() isn't supported. We should either prevent this from getting converted into Math.random_int() or we need to add random_int into the Math module so the converted code works well.

I wasn't sure which direction to go in. If you have suggestion on this, I can implement it in the same PR or in a different one.

[zth]

I also found that Js.Math.random_int() isn't supported. We should either prevent this from getting converted into Math.random_int() or we need to add random_int into the Math module so the converted code works well.

I wasn't sure which direction to go in. If you have suggestion on this, I can implement it in the same PR or in a different one.

Ah right, yes, that sounds useful. Separate PR would be good. There's a Math.Int module where we can put it.