Update glob to v10

Keeping (dev) dependencies up to date is likely a good idea, especially
if later versions are (ever so slightly) faster. glob v10 removed its
default export, so the `globSync` named export is now used in scripts.
Since the platform path separator is now used starting from glob v9, the
`posix` option is enabled to fix the resulting breakage. glob v9 also
removed the sorting of results, which caused one test to fail, as the
bundled standard library object had differently ordered fields, which in
turn affected the order in `Program#elementsByName`. `.sort()` is used
on the standard library glob in build.js to alleviate this issue (I am
unsure if glob returns deterministic results).

Author: CountBleck