Exclude init functions from function_parameter_count rule?

[delebedev]

I have a lot of immutable models in the project (probably everyone has nowadays).

    //swiftlint:disable function_parameter_count
    init(ID: Int, stripeID: String, last4: String, vendor: String, expirationMonth: Int, expirationYear: Int) {
        self.ID = ID
        self.stripeID = stripeID
        self.last4 = last4
        self.vendor = vendor
        self.expirationMonth = expirationMonth
        self.expirationYear = expirationYear
    }

Almost every of them triggers function_parameter_count.
It also happens with a lot of services/viewModels due to heavy usage of constructor injection.

When I implemented this rule first I was thinking about it as a guideline which helps to expose "complex" behaviours and function calls, but I tend to think now that init should be excluded by default.
Happy to do a PR but it's a controversial change so should be discussed first.

[norio-nomura]

This is a duplicate of #544.

[norio-nomura]

I think PR will be welcomed! 😃