Support for Borg create & prune --stats via borgmatic command-line flag (#100)

scripts/find-unsupported-borg-options

@@ -41,6 +41,7 @@ for sub_command in prune create check list info; do
             | grep -v '^--nobsdflags$' \
             | grep -v '^--pattern$' \
             | grep -v '^--progress$' \
+            | grep -v '^--stats$' \
             | grep -v '^--read-special$' \
             | grep -v '^--repository-only$' \
             | grep -v '^--show-rc$' \