A GitHub Actions that installs MicroHs

This action provides mcs, mcabal, cpphs, and MicroHs compatible libraries.

It's also very fast (< 1s).

# file .github/workflows/micro-hs.yml

name: MicroHs

on:
  pull_request:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: sol/setup-MicroHs@nightly
      - run: mcabal -r test