Migrate fortls and fpm to Homebrew Core

[ankane]

Since both are now available there

• https://formulae.brew.sh/formula/fortls
• https://formulae.brew.sh/formula/fpm

[perazz]

I think it’s a great idea @ankane. How are the core formulas contributed to? Excuse my ignorance on the topic: is there a centralized way to create the bottles etc., or they have to be prepared manually?

[ankane]

@perazz Changes are done through PRs to the homebrew-core repo, and Homebrew handles building all bottles (as well as version bumps in many cases). For instance, here's the history of fortls.

Edit: Pushed an update below to fix CI