* I'm in the process of updating a rails app from rails 5.2 to rails 7.
Currently the app is using AASM version 4.12.3. When I update to AASM
version 5.x we start getting a failing spec in our app. The
implementation uses the `after:` dsl and passes it a class.
``` ruby
event :run_payment_create do
transitions to: :active, after: Payment::GoCardless::Subscription::Charge
end
```
The spec in our app expects that class to receive new 1 time with the args
passed from after, but the spec is failing saying that `Payment::GoCardless::Subscription::Charge`
received `.new` with the expected args twice.
I started debugging with `bundle open aasm` and pry and I found that the
`ClassInvoker` has a `instance` method that memoizes the instance
returned from the `retrieve_instance` method, but the `instance`
method was only being used by `log_source_location` and `log_method_info`
methods while `invoke_subject` was calling `retrieve_instance` directly
resulting in `retrieve_instance` being called twice.
* Update `invoke_subject` method to use `instance.call` so that the
instance will be memoized and subsequent calls to `instance` won't try
to instantiate the class a second time.
