PS: Flip the parent child relation.

Author: MathiasVP

powershell/ql/lib/semmle/code/powershell/Ast.qll

@@ -3,7 +3,7 @@ import powershell
 class Ast extends @ast {
   string toString() { none() }
 
-  Ast getParent() { parent(result, this) }
+  Ast getParent() { parent(this, result) } // TODO: Flip parent and child in relation in the extractor
 
   Location getLocation() { none() }
 }