fix: setup defaults

If no pre-if or post-if is given, it should default to 'always()'.
This could be set even if there is no pre or post step.
In fact this is required for composite actions and included post
steps to run.

pkg/model/action.go

@@ -95,10 +95,10 @@ func ReadAction(in io.Reader) (*Action, error) {
 	}
 
 	// set defaults
-	if a.Runs.Pre != "" && a.Runs.PreIf == "" {
+	if a.Runs.PreIf == "" {
 		a.Runs.PreIf = "always()"
 	}
-	if a.Runs.Post != "" && a.Runs.PostIf == "" {
+	if a.Runs.PostIf == "" {
 		a.Runs.PostIf = "always()"
 	}