Bump sidekiq from 7.1.5 to 7.1.6

Bumps sidekiq from 7.1.5 to 7.1.6.

Changelog

Sourced from sidekiq's changelog.

7.1.6

• The block forms of testing modes (inline, fake) are now thread-safe so you can have a multithreaded test suite which uses different modes for different tests. #6069
• Fix breakage with non-Proc error handlers #6065

Commits

• e9f2129 Thread safety for block-based testing modes, fixes #6069
• d9e0136 Unlock dev dep versions
• a9c7dd8 pro change
• 699f4b5 rdoc fixes
• b7236f8 Add test for classy handlers
• 39dea26 changes
• 2abed51 Convert filter test to spec style, bump
• e1463ff Fix breakage with non-Proc error handlers, fixes #6065
• af38141 Add note about 704
• b9e552c note about lock compatibility breakage
• Additional commits viewable in compare view

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