support follow symlinks on directories

[milahu]

currently tiny-glob does not find files in symlinked directories

sample:

#!/bin/bash

mkdir dir-1
touch dir-1/file-1
ln -s dir-1 dir-1-linked

# run tiny-glob
node -e "console.log(require('tiny-glob/sync.js')('dir*/**').join('\n'))"

# actual result
dir-1/file-1

# expected result
dir-1/file-1
dir-1-linked/file-1

the problem should be

if (!stats.isDirectory()) {

which does not detect symlinked directories
where stats.isSymbolicLink() == true

fs.realpathSync(path) can be used to fully resolve the link target
but that returns the absolute path ....

other glob tools have this feature normally off
and only enabled with a follow: true option
one reason: circular symlinks give infinite recursion

[terkelg]

Thank you! Would you mind doing a PR for this?