Having any (non-deprecated) opening_brace option in .swiftlint.yml triggers deprecation warning

[florianschulz]

New Issue Checklist

• I've Updated SwiftLint to the latest version.
• I've searched for existing GitHub issues.

Bug Description

If you include any opening_brace option in .swiftlint.yml, a warning is emitted right at the beginning of swiftlint's output:

% swiftlint
warning: Configuration option 'allow_multiline_func' in 'opening_brace' rule is deprecated. Use the option 'ignore_multiline_function_signatures' instead.
Linting Swift files in current working directory
Linting 'SwiftLintDemoApp.swift' (1/2)
Linting 'ContentView.swift' (2/2)
Done linting! Found 0 violations, 0 serious in 2 files.

Environment

• SwiftLint version 0.57.0
• Installation method used: Homebrew
• Example configuration file:

opening_brace:
  ignore_multiline_statement_conditions: true
  ignore_multiline_function_signatures: true