chore(circleci): authenticate composer into github

Author: dadish

.circleci/config.yml

@@ -14,6 +14,7 @@ workflows:
       - test:
           name: test-php-7.2
           context:
+            - github-credentials
             - dockerhub-credentials
           php: "7.2"
           phpunit: "7.5"
@@ -22,6 +23,7 @@ workflows:
       - test:
           name: test-php-8.1
           context:
+            - github-credentials
             - dockerhub-credentials
           php: "8.1"
           phpunit: "9.5.10"
@@ -92,6 +94,7 @@ jobs:
           name: Install Dependencies
           command: |
             rm composer.lock
+            composer config http-basic.github.com dadish ${GH_TOKEN}
             composer require phpunit/phpunit ^<<parameters.phpunit>> --dev
             composer update --with-all-dependencies
             composer install