Update containernetworking/cni to v1.2.3 for GC

Signed-off-by: Dan Winship <danwinship@redhat.com>

plugins/meta/bandwidth/main.go

@@ -282,7 +282,13 @@ func cmdDel(args *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.VersionsStartingFrom("0.3.0"), bv.BuildString("bandwidth"))
+	skel.PluginMainFuncs(skel.CNIFuncs{
+		Add:   cmdAdd,
+		Check: cmdCheck,
+		Del:   cmdDel,
+		/* FIXME GC */
+		/* FIXME Status */
+	}, version.VersionsStartingFrom("0.3.0"), bv.BuildString("bandwidth"))
 }
 
 func SafeQdiscList(link netlink.Link) ([]netlink.Qdisc, error) {