"Alias"-ing of built-in PICO-8 functions? [Suggestion]
Hiya,

Just a suggestion: rather than excluding built-in PICO-8 functions from being "minified", could luamin instead create a shorter "alias" to them?  Such as...
`pr=printh
pr("hello world")` 
This is a technique I normally use from time to time to reduce the overall character count. 

Now, I guess this would only be beneficial if a particular function is called more than a couple of times (to warrant the overhead of the alias), but just thought that, if possible, this might be a way to further reduce the final output's footprint.

At the very least, it would be nice if luamin wouldn't "break" the code when *I* setup a function alias (which seems to happen currently).

Anyways, just a thought. :wink: 