Update timecop 0.8.0 -> 0.9.1

What does this MR do?

Originally opened at !26212 (closed) by @pravi.

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Update timecop ruby gem to latest upstream release

Changes: https://github.com/travisjeffery/timecop/blob/master/History.md

Full changes: https://github.com/travisjeffery/timecop/compare/v0.8.1...v0.9.1

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines
• Merge request performance guidelines
• Style guides
• Separation of EE specific content