Upgrade to 0.60.8 (pre-release snapshot).

Changelog at http://aspell.net/man-html/ChangeLog.html.

Note: it includes a fix for a potently unbounded buffer over-read in GNU Aspell
0.60.*, but unfortunately, the fix will break applications that use null-
terminated UCS-2 or UCS-4 strings with the C API.

See details at
https://lists.gnu.org/archive/html/aspell-announce/2019-08/msg00000.html.

Security: Potently unbounded buffer over-read in GNU Aspell 0.60.*