Update SwiftLint file header rule

[defagos]

Description

As a Pillarbox developer I want the file_header rule pattern to exactly match the expected header format. Refactoring made in SwiftLint 0.60 broke our existing rule.

Acceptance criteria

The rule in our .swiftlint.yml file has been restored to:

file_header:
  required_pattern: |
    \/\/
    \/\/  Copyright \(c\) SRG SSR. All rights reserved.
    \/\/
    \/\/  License information is available from the LICENSE file.
    \/\/

and validates:

//
//  Copyright (c) SRG SSR. All rights reserved.
//
//  License information is available from the LICENSE file.
//

With SwiftLint 0.60.0 the last line of the pattern has to be dropped, otherwise validation fails.

Tasks

• Open a SwiftLint issue or PR.
• Update Pillarbox SwiftLint configuration file.
• Update Castor SwiftLint configuration file.