Add support for multi digits dirstack entry (e.g. +12). (#1080)

templates/zsh.txt

@@ -84,7 +84,7 @@ function __zoxide_z() {
     __zoxide_doctor
     if [[ "$#" -eq 0 ]]; then
         __zoxide_cd ~
-    elif [[ "$#" -eq 1 ]] && { [[ -d "$1" ]] || [[ "$1" = '-' ]] || [[ "$1" =~ ^[-+][0-9]$ ]]; }; then
+    elif [[ "$#" -eq 1 ]] && { [[ -d "$1" ]] || [[ "$1" = '-' ]] || [[ "$1" =~ ^[-+][0-9]+$ ]]; }; then
         __zoxide_cd "$1"
     elif [[ "$#" -eq 2 ]] && [[ "$1" = "--" ]]; then
         __zoxide_cd "$2"