`urlencode` is only compatible with Py2

https://github.com/mathiasbynens/dotfiles/issues/470#issuecomment-1541346659

Why not update it?

BTW, here's my implementation
```py
alias urlencode='python3 -c "from sys import argv; from urllib.parse import quote_plus as q; print(q(argv[1]))"'
```