Node.js 12 actions are deprecated

[ljackson96]

I am currently having an issue with running the minifier with my previous configuration. In my newest config, I have included the newest version of node, but still to no avail. Any pointers or guidance would be greatly appreciated. Thanks!

`
name: minify css

on:
push:
branches:
- dev

jobs:
read:
runs-on: ubuntu-latest

steps:
  - uses: actions/checkout@v3
  - name: Use Node.js ${{ matrix.node-version }}
    uses: actions/setup-node@v3
    with:
      node-version: "15.x"
  - run: npm ci
  - run: npm run build --if-present
  - run: npm test
  - name: minisauras
    uses: TeamTigers/minisauras@v2.0.0
    env:
      GITHUB_TOKEN: ${{ secrets.TOKEN }}
    id: dir
    with:
      directory: 'assets/templates/circupool-core/css' ## minify all files under assets directory

`