Try to force the versions in a different way, again^3

Author: Jean85

.github/workflows/tests.yaml

@@ -24,7 +24,7 @@ jobs:
             dependencies: 'highest'
             deprecations: 'disabled'
           - description: 'Symfony 4.4'
-            php: '7.2'
+            php: '7.3'
             symfony_require: '^4.4'
           - description: '(prefer lowest)'
             php: '7.2'