Fix command list action

Author: yuler

gh-todo

@@ -61,6 +61,7 @@ while [ $# -gt 0 ]; do
     case "$1" in
     -v | --version)
         echo $version
+        exit 0
         ;;
     -h | --help)
         help
@@ -80,6 +81,9 @@ while [ $# -gt 0 ]; do
         fi
         add "$input"
         ;;
+    list)
+        list
+        ;;
     *)
         help >&2
         exit 1