Replace uncommon operators with named functions and remove obscure symbols

It is hard for me to contribute to the `PodToBUILD` source code because I don't regularly use operators in this project, and don't have a reason to memorize them. Additionally many are too hard to type.

Any symbols that don't exist on an Apple laptop on should be removed and linted against. I can't / don't want to use special shortcuts to type these characters in order to contribute to `PodToBUILD`.

The presence of these operators and symbols increases the barrier to entry to working on this for me, despite the fact that I'm somewhat familiar with the source code.