Make error reporting more robust to panic

internal/cli/app/app.go

@@ -3,13 +3,17 @@ package app
 import (
 	"os"
 
+	"github.com/apex/log"
 	ooni "github.com/ooni/probe-cli"
 	"github.com/ooni/probe-cli/internal/cli/root"
 )
 
 // Run the app. This is the main app entry point
-func Run() error {
+func Run() {
 	root.Cmd.Version(ooni.Version)
 	_, err := root.Cmd.Parse(os.Args[1:])
-	return err
+	if err != nil {
+		log.WithError(err).Error("failed to parse arguments")
+	}
+	return
 }