False positive in Redundant Set Access Control Rule

[jpsim]

New Issue Checklist

• Updated SwiftLint to the latest version (master)
• I searched for existing GitHub issues

Bug Report

Private has different meanings when at the top-level vs nested. Top-level effectively means "fileprivate" whereas nested means "private within this scope".

Repro:

private final class A {
    private(set) var value: Int
    ^ warning: Redundant Set Access Control Rule Violation: Property setter access level shouldn't be explicit if it's the same as the variable access
}

In this case, the code is acceptable and we shouldn't require fileprivate final class A.

This rule was added in #2036.