Run tests on PHP 8.4 and update test environment

Author: PaulRotmann

.github/workflows/ci.yml

@@ -34,8 +34,6 @@ jobs:
       - run: composer remove react/mysql --dev --no-interaction # do not install react/mysql example on legacy PHP
         if: ${{ matrix.php == 5.3 }}
       - run: composer install
-      - name: Set SSH_PROXY environment variable
-        run: echo "SSH_PROXY=your_ssh_proxy_value" >> $GITHUB_ENV
       - run: vendor/bin/phpunit --coverage-text
         if: ${{ matrix.php >= 7.3 }}
       - run: vendor/bin/phpunit --coverage-text -c phpunit.xml.legacy
@@ -52,6 +50,4 @@ jobs:
           version: lts-3.30
       - run: composer self-update --2.2 # downgrade Composer for HHVM
       - run: hhvm $(which composer) install
-      - name: Set SSH_PROXY environment variable
-        run: echo "SSH_PROXY=alice:password@example.com vendor/bin/phpunit" >> $GITHUB_ENV
       - run: hhvm vendor/bin/phpunit