Merge branch 'master' of github.com:php-actions/composer

Author: Greg Bowler

.github/main.workflow

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+workflow "Test exitcode for Composer commands" {
+  on = "push"
+  resolves = [
+    "Test composer require"
+  ]
+}
+
+action "Test composer require" {
+  uses = "./"
+  args = "require phpgt/webengine"
+}

README.md

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+# Use the Composer CLI in your Github Actions.

action.yml

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+name: 'Composer (php-actions)'
+description: 'Use the Composer CLI in your Github Actions.'
+inputs:
+  command:
+    description: 'Composer command to run'
+    required: true
+    default: 'install'
+outputs:
+  time:
+    description: 'The time the action was run'
+runs:
+  using: 'docker'
+  image: 'Dockerfile'
+  args:
+    - ${{ inputs.command }}
+branding:
+  icon: 'package'  
+  color: 'purple'