Update CRoaring dependency to latest version

[jgr-gh]

Please update the CRoaring dependency to the latest version, which has a number of desired improvements. In particular, the malloc-free iterator.

[lemire]

@jgr-gh That's a great idea. Can you prepare a pull request ?

[wti]

See #22. (Iterator improvements unverified).

[jgr-gh]

@wti Thank you for updating the dependencies.

[wti]

Still working on CI: ubuntu-latest (like CRoaring CI) is working. Not done yet.