zsh: parse error near `|'

[black7375]

batwatch can't be compiled.

## Input
zcompile batwatch

## Result
zsh: parse error near `|'
zcompile: can't read file: batwatch

[eth-p]

bat-extras currently can't run in any other shells than Bash. I used a lot of Bash-isms in bat-extras, and they unfortunately aren't portable between shells.

I'll see what I can do to support zsh, but it might take a while (if it's even possible with the feature requirements this project has).