Bump to the latest stable version. Be aware that cryptsetup changed the
default LUKS header format with this version. When porting this to a
stable distribution you should supply the configure flag
`--with-default-luks-format=LUKS1` to preserve the user experience
there.
The full changelog can be seen at [0].
[0] https://gitlab.com/cryptsetup/cryptsetup/blob/master/docs/v2.1.0-ReleaseNotes