Update `Config.call_if`

[heitorpolidoro]

• [ ] heitorpolidoro/github-app-handler#227

Replace the

if Config.batata:
  ...
else:
  sub_run.update("disabled"...)

for something like

@Config.call_if("batata", call_on_else=lambda: sub_run.update("disabled"...))

[bartholomew-smith[bot]]

Job's done