create phpunit directory

Author: Davide Fantuzzi

.github/workflows/tests.yml

@@ -126,6 +126,7 @@ jobs:
               && chmod +x /usr/bin/cc-test-reporter \
               && cc-test-reporter before-build \
               && vendor/bin/phpunit --config phpunit.coverage.xml.dist -d memory_limit=1024M \
+              && mkdir -p out/phpunit \
               && cp out/phpunit/clover.xml clover.xml \
               && cc-test-reporter after-build --id ec331dd009edca126a4c27f4921c129de840c8a117643348e3b75ec547661f28 --exit-code 0