Post PHPUnit test results to Gitea

Enable in phpunit.xml with

```plain
<phpunit ... printerClass="JHodges\GiteaBotPHPUnit\ResultPrinter">

<php>
  <env name="GiteaUrl" value="https://try.gitea.io/api/v1/"/>
  <env name="GiteaUser" value="bot"/>
  <!--env name="GiteaPass" value="xxx"/--> <!--probably set this on the machine env-->
  <env name="GiteaRepoUser" value="bobemoe"/>
  <env name="GiteaRepo" value="test"/>
</php>

<logging>
  <log type="junit" target="/tmp/logfile.xml"/>
  <log type="testdox-text" target="/tmp/testdox.txt"/>
</logging>
```