development-dependency: bump rubocop-rails from 2.11.2 to 2.11.3

Bumps rubocop-rails from 2.11.2 to 2.11.3.

Release notes

Sourced from rubocop-rails's releases.

RuboCop Rails 2.11.3

Bug fixes

• #517: Fix an issue for Rails/UniqueValidationWithoutIndex when validating uniqueness with a polymorphic scope. (@​theunraveler)

Changelog

Sourced from rubocop-rails's changelog.

2.11.3 (2021-07-11)

Bug fixes

• #517: Fix an issue for Rails/UniqueValidationWithoutIndex when validating uniqueness with a polymorphic scope. ([@​theunraveler][])

Commits

• aac3a77 Cut 2.11.3
• 2e73f21 Use Node#left_sibling(s) and Node#right_sibling(s)
• 4a3519b Merge pull request #517 from theunraveler/polymorphic_unique_validation_witho...
• 112e9b1 Fixing UniqueValidationWithoutIndex cop when validating uniqueness on a pol...
• a91b852 Switch back docs version to master
• See full diff in compare view

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