Github action for using composer in your workflows. The action comes with hirak/prestissimo preinstalled.
Uses the new YML syntax.

php7.4: Based on php:7.4-cli-alpine with composer and hirak/prestissimo
php7.3: Based on php:7.3-cli-alpine with composer and hirak/prestissimo

0.2.0 uses a pre-built docker image composer-prestissimo (basing on the official composer image). This improves build time (is now around 13s), since now the action only needs to pull instead of building it every time.

0.1.1 uses the the offical composer docker image directly and installs hirak/prestissimo.
Due to this, the image is freshly built everytime (roughly 31s).

steps:
  - name: Run composer
    uses: nick-zh/composer-php@master
    with:
      action: 'install -oa'