other than running the unit tests on this project, I ran `arc unit` on two other projects: one with a unit engine configured in .arcconfig, and a second with the following .arcunit file:
```lang=json
{
"engines": {
"phpunit": {
"type": "phpunit",
"include": "(\\.php$)",
"flags": {
"--whitelist": "$ROOT/src",
"--include-path": "~/dev"
},
"binary": "vendor/bin/phpunit"
}
}
}
```
I observed the desired unit test commands being run in the trace output