Remove unsupported phpunit option

Author: stof

.github/workflows/ci.yml

@@ -64,4 +64,4 @@ jobs:
                 run: composer update --ansi --no-progress --prefer-dist --no-interaction ${{ matrix.composer_flags }}
 
             -   name: Run tests
-                run: vendor/bin/phpunit -v --colors=always
+                run: vendor/bin/phpunit --colors=always