Redundant type annotation rule ignores nested types

[iby]

New Issue Checklist

• [x ] Updated SwiftLint to the latest version
• [ x] I searched for existing GitHub issues

Describe the bug

Redundant type annotation ignores nested types, for example, the following static property doesn't get picked up, while others are:

fileprivate static let version: AnnouncementStore.Attribute = AnnouncementStore.Attribute("Version")

Environment

• SwiftLint version: 0.39.1
• Installation method used: Homebrew
• Paste your configuration file:

# https://realm.github.io/SwiftLint/rule-directory.html
# https://github.com/realm/SwiftLint#configuration
# swiftlint rules

included: source

disabled_rules:
  - cyclomatic_complexity
  - discarded_notification_center_observer
  - duplicate_imports
  - file_length
  - force_cast
  - force_try
  - function_body_length
  - function_parameter_count
  - identifier_name
  - large_tuple
  - line_length
  - nesting
  - opening_brace
  - private_over_fileprivate
  - redundant_discardable_let
  - type_body_length
  - type_name
  - unused_closure_parameter
  - unused_setter_value # https://github.com/realm/SwiftLint/issues/2585
  - weak_delegate

opt_in_rules:
  redundant_type_annotation

trailing_comma:
  mandatory_comma: true

trailing_whitespace:
  ignores_comments: false

vertical_whitespace:
  max_empty_lines: 2

switch_case_alignment:
  indented_cases: true

• Are you using nested configurations: No
• Which Xcode version are you using: Xcode 11.3, Build version 11C29
• Do you have a sample that shows the issue: See above.

[stale]

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