Update TypeQuery visitor

Author: cdce8p

mypy/type_visitor.py

@@ -353,10 +353,10 @@ def visit_type_var(self, t: TypeVarType) -> T:
         return self.query_types([t.upper_bound, t.default] + t.values)
 
     def visit_param_spec(self, t: ParamSpecType) -> T:
-        return self.strategy([])
+        return self.query_types([t.default])
 
     def visit_type_var_tuple(self, t: TypeVarTupleType) -> T:
-        return self.strategy([])
+        return self.query_types([t.default])
 
     def visit_unpack_type(self, t: UnpackType) -> T:
         return self.query_types([t.type])