Merge pull request #150 from Sysix/shepherd

set psalm error level to 5 (lower is better)

Author: Sysix

psalm.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <psalm
-    errorLevel="8"
+    errorLevel="5"
     resolveFromConfigFile="true"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="https://getpsalm.org/schema/config"