PHPUnit 9.3 released a new schema for the phpunit.xml configuration file. I had to migrate the file to the new format in order to avoid the warning. PHPUnit Versions older than 9.3 have to use the phpunit.xml.legacy configuration file because the new format is unknown for them.
For further details concerning this pull request look into graphp/graphviz #46.
PHPUnit 9.3 released a new schema for the
phpunit.xmlconfiguration file. I had to migrate the file to the new format in order to avoid the warning. PHPUnit Versions older than 9.3 have to use thephpunit.xml.legacyconfiguration file because the new format is unknown for them. For further details concerning this pull request look into graphp/graphviz #46.This pull request builds on top of #174 and #177.