[PhpUnitBridge] fix handling the COMPOSER_BINARY env var when using simple-phpunit#41780

Merged

nicolas-grekas merged 1 commit intosymfony:4.4from

Taluu:fix/phpunit-bridge-composer-binary-env

Jun 22, 2021

Commits on Jun 22, 2021

Reapply the change to allow to set the composer binary path
Taluu
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