Normalise windows paths

[timacdonald]

(hopefully) Fixes #6

My (possibly flawed) understanding of the problem is that the path.resolve function is converting POSIX paths to Windows paths on Windows machines.

So specifying...

FullReload(['path/to/files/**'])

results in...

["path\\to\\files\\**"]

after calling...

const files = Array.from(paths).map(path => resolve(root, path)).map(normalizePath)

chokidar.watch is then expecting to receive POSIX paths. From the docs...

So it all breaks down.

This PR proposes that we pipe all paths through Vite's normalizePath function before passing to chokidar. I believe this is the recommended way of doing things:

The normalizePath function is available in Vite 2 and Vite 3.

Warning: I do not have a windows machine to verify the bug, but also to verify this fix. This solutions needs some real-world testing to be done. I'm just taking a stab in the dark at the fix here 🤠

[ElMassimo]

Thanks Tim! We'll need to add vite as a peer dependency now, I'll do that on a separate PR.

[timacdonald]

@ElMassimo were you able to test this fix to validate it? I finally got a Windows virtual machine setup so I can test it if you didn't yourself?

edit: oh, I see that @guasam tested it for us! Thank you!

[timacdonald]

p.s. my bad on the peer dependency! thanks for adding that in.