-1 => 65535
I just ran across this oddity:

```sh
$ echo 'a=-1' | shrinko8 - - --minify --count  #good
tokens: 3 0%
chars: 4 0%
compressed: 13 0%
pico-8 cartridge // http://www.pico-8.com
version 41
__lua__
a=-1

$ echo 'a=-1' | shrinko8 - - --minify --no-minify-tokens --count  #what?
tokens: 3 0%
chars: 7 0%
compressed: 16 0%
pico-8 cartridge // http://www.pico-8.com
version 41
__lua__
a=65535
```