Replace Zend_Measure with php-units-of-measure

- see https://github.com/PhpUnitsOfMeasure/php-units-of-measure

Author: sreichel

composer.json

@@ -39,6 +39,7 @@
         "nnnick/chartjs": "^4.4",
         "openmage/composer-plugin": "^3.1",
         "pelago/emogrifier": "^8.0",
+        "php-units-of-measure/php-units-of-measure": "^2.2",
         "phpseclib/mcrypt_compat": "^2.0.3",
         "phpseclib/phpseclib": "^3.0.14",
         "shardj/zf1-future": "^1.24.1",
@@ -196,4 +197,4 @@
         "vendor:patch": "Create patch file",
         "test": "Run php-cs-fixer, phpstan & phpunit"
     }
-}
+}