NEXT-36037 - Conflict old PHP font lib version

There is a known bug in the font lib regarding loading fonts.
Conflict all versions that are not fixed.
refer to dompdf/php-font-lib#128

Author: keulinho

composer.json

@@ -7,6 +7,7 @@
         "shopware/core": "*"
     },
     "conflict": {
+        "phenx/php-font-lib": "<0.5.5",
         "shopware/core": "<6.5",
         "twig/twig": "~3.9.0",
         "twig/intl-extra": "~3.9.0",