Remove typescript from the peerDependencies in @formatjs/intl

[phuhl]

Hi, I know, there were a few similar issues, but I wanted to raise this question because in my node modules folder I saw that @formatjs/intl includes the complete typescript package. That's a whopping 65M and I wonder if this is strictly necessary? No other package I use needs typescript as a dependency, as it is usually only used in the build process.

I think, reducing bundle sizes is a benefit for a lot of folks as it increases deploy speed and so on. One could of course bundle server side code to tree shake everything out, but that comes with it's own issues... (actually, does treeshaking work on require statements anyways? not sure right now)

Cheers