Implement as middleware

[therefromhere]

As an alternative to using handler500 we could implement this as a middleware using process_exception.

https://docs.djangoproject.com/en/2.2/topics/http/middleware/#process-exception

[renevall]

@therefromhere do you plan on to continue supporting this library? I love the idea.

[therefromhere]

It's not currently being actively developed, but PRs would be welcome!

[opobla]

There it goes :) #4