Restrict compare by type

[dhrapson]

Hi,
We like the migra tool and use it for comparing our postgres databases.
There are some scenarios where we want to avoid comparing specific types of things (e.g. if a rollback has occurred there may be additional functions, views, triggers left in place).
I was hoping you might consider supporting the inclusion/exclusion of specific object types, similar to how we are able to include/exclude the comparison of privileges.
One way would be by:

• adding a --includeObjects parameter (or similar) that we could provide a list of those object types we want to include
• defaulting the list to all object types

Or by having a separate list of CLI option per type if you would prefer.
Happy to submit a PR if you that would help.

Thanks