Support custom typescript version

[iFwu]

I don't know if it is possible.
List typescript in peerDependencies and allow user to use custom typescript version.

[wessberg]

Hi there, thanks for creating this issue.
I've considered this several times, but there are some things holding me back still, primarily that I am yet to decide the acceptable range of Typescript versions.

For your specific use case, which Typescript version is needed, and why?

[iFwu]

Not very necessary, but would be better if I can use the same typescript version across the project.
By the way, I would like to try typescript@next 3.5 as it may have better compiling performance (ezolenko/rollup-plugin-typescript2#148 (comment))

[wessberg]

Typescript v3.5 is supported by this plugin, so that will work just fine! I'll keep this issue open and will close it if and when I'm moving Typescript to peerDependencies

[wessberg]

I've released v1.1.59 where Typescript is moved to peerDependencies. If you have any additional issues or questions, please feel free to comment again.