Partially fixes https://github.com/microsoft/playwright/issues/31337 by
supporting ignoring node_modules on windows.
When I debug the function it gets a unix style path filename on windows,
so the function never ignores node_modules. The ignore path globs are
expected to use the unix path seperator and I've tested this fix works
on windows and I assume that since mac uses unix style, it also works
there (this is a pretty standard glob construct (chokidar points at any
match https://github.com/micromatch/anymatch and anymatch has this exact
example in their readme.md)
Signed-off-by: Luke Page <137174537+lukpsaxo@users.noreply.github.com>
