Merge branch '4.4' into 5.0

* 4.4:
  [PhpUnitBridge] fix leftover
  [PhpUnitBridge] fix installing under PHP >= 8
  Use ">=" for the "php" requirement
  bump icu 67.1

Author: nicolas-grekas

composer.json

@@ -16,7 +16,7 @@
         }
     ],
     "require": {
-        "php": "^7.2.5"
+        "php": ">=7.2.5"
     },
     "require-dev": {
         "symfony/process": "^4.4|^5.0"