Rivet unofficial artefacts

Release candidate of Rivet 2.2

-rw-r--r--  1 mxmanghi mxmanghi 1177800 Apr  5 16:05 rivet-2.2.2rc1.tar.gz
-rw-r--r--  1 mxmanghi mxmanghi 1496307 May 14 13:44 rivet-2.2.3rc1.tar.gz