AutoEquatable Error due to changing type access level to public

[lordcodes]

A recent PR changed the access level on the Equatable conformance in AutoEquatable to public.

#616

Before this change, Sourcery was correctly generating Equatable conformances in my project, however, after updating to 0.14.0, which is after this change, it can no longer build the project.

The error given: Function cannot be declared public because its parameter uses an internal type.

This is due to the type that is being used with AutoEquatable is internal.

Was this change to public definitely required, as it is perfectly legal to have an equatable implementation in your type that isn't public.

class MyClass: AutoEquatable {
  let field0: String
  let field1: String
}

Before change
Builds successfully.

extension MyClass: Equatable {}
internal func == (lhs: MyClass, rhs: MyClass) -> Bool {
    guard lhs.field0 == rhs.field0 else { return false }
    guard lhs.field1 == rhs.field1 else { return false }
    return true
}

After change
Fails to build

extension MyClass: Equatable {}
public func == (lhs: MyClass, rhs: MyClass) -> Bool {
    guard lhs.field0 == rhs.field0 else { return false }
    guard lhs.field1 == rhs.field1 else { return false }
    return true
}

Alternative

extension MyClass: Equatable {
   static func == (lhs: MyClass, rhs: MyClass) -> Bool {
        guard lhs.field0 == rhs.field0 else { return false }
        guard lhs.field1 == rhs.field1 else { return false }
        return true
    }
}

This alternative also matches the Equatable docs:
https://developer.apple.com/documentation/swift/equatable