Merge branch '5.0'

* 5.0:
  Use PHP 7.2 minimum in tests run with github actions
  Fix exception messages containing exception messages

Author: nicolas-grekas

Normalizer/AbstractObjectNormalizer.php

@@ -332,7 +332,7 @@ public function denormalize($data, string $type, string $format = null, array $c
             try {
                 $this->setAttributeValue($object, $attribute, $value, $format, $context);
             } catch (InvalidArgumentException $e) {
-                throw new NotNormalizableValueException(sprintf('Failed to denormalize attribute "%s" value for class "%s": '.$e->getMessage(), $attribute, $type), $e->getCode(), $e);
+                throw new NotNormalizableValueException(sprintf('Failed to denormalize attribute "%s" value for class "%s": ', $attribute, $type).$e->getMessage(), $e->getCode(), $e);
             }
         }