Bug: cannot run unit tests due to missing file

[EAGrahamJr]

Apparently wasn't included in the last version/sync? 😁

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-resources-plugin:3.3.0:testResources (default-testResources) on project diozero-core: copying /home/crackers/projects/diozero/diozero-core/src/test/resources/dev/gpiochip4 to /home/crackers/projects/diozero/diozero-core/target/test-classes/dev/gpiochip4 failed with NoSuchFileException: /home/crackers/projects/diozero/diozero-core/target/test-classes/dev/gpiochip4 -> [Help 1]