st-push-tag: Pass arguments to git push

This allows to call it like this:

  st-push-tag -f $REMOTE

bin/st-push-tag

@@ -8,7 +8,8 @@ die() {
     exit 1
 }
 
-REMOTE="$1"
+[[ $# -ge 1 ]] || \
+    die "Usage: $0 <remote>"
 
 TAGS="$(git tag --points-at HEAD | grep alt)"
 
@@ -20,4 +21,4 @@ TAGS="$(git tag --points-at HEAD | grep alt)"
 
 # make it loud
 set -x
-git push "$REMOTE" "$TAGS"
+git push "$@" "$TAGS"