Fix composer Could not authenticate against github.com on CI

See:
    * https://github.com/shivammathur/setup-php#composer-github-oauth
    * https://docs.github.com/en/actions/reference/authentication-in-a-workflow

.github/workflows/ci.yaml

@@ -25,6 +25,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: PHP lint
         run: "find *.php Classes Configuration Tests -name '*.php' -print0 | xargs -0 -n 1 -P 4 php -l"
@@ -49,6 +51,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -92,6 +96,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -128,6 +134,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "7.4"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install xmllint
         run: sudo apt-get install libxml2-utils
@@ -165,6 +173,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "7.4"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -203,6 +213,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -244,6 +256,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -288,6 +302,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -343,6 +359,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -399,6 +417,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -452,6 +472,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -492,6 +514,8 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: "${{ matrix.php-version }}"
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Get Composer Cache Directory
         id: composer-cache