feat: Altera tipo da action para rodar com Node 18 (#5)

- altera o tipo da action para `composite`
- configura o ambiente em Node 18
-  cria o step `Stylelint evaluator` para rodar o script dist/index.js

action.yml

@@ -8,5 +8,16 @@ inputs:
     description: 'Pull Request number that dispatched the workflow'
     required: true
 runs:
-  using: "node16"
-  main: "dist/index.js"
+  using: "composite"
+  steps:
+    - name: Setup Node.js
+      uses: actions/setup-node@v3
+      with:
+        node-version: '18'
+
+    - name: Stylelint Evaluator
+      run: node ${{ github.action_path }}/dist/index.js
+      shell: bash
+      env:
+        INPUT_TOKEN: ${{ inputs.token }}
+        INPUT_PR_NUMBER: ${{ inputs.pr_number }}