Update rails requirement from ~> 6 to >= 6, < 8

[dependabot]

Updates the requirements on rails to permit the latest version.

Release notes

Sourced from rails's releases.

v7.0.4

Active Support

• Redis cache store is now compatible with redis-rb 5.0.

  Jean Boussier

• Fix NoMethodError on custom ActiveSupport::Deprecation behavior.

  ActiveSupport::Deprecation.behavior= was supposed to accept any object that responds to call, but in fact its internal implementation assumed that this object could respond to arity, so it was restricted to only Proc objects.

  This change removes this arity restriction of custom behaviors.

  Ryo Nakamura

Active Model

• Handle name clashes in attribute methods code generation cache.

  When two distinct attribute methods would generate similar names, the first implementation would be incorrectly re-used.

  class A
    attribute_method_suffix "_changed?"
    define_attribute_methods :x
  end
  class B
  attribute_method_suffix "?"
  define_attribute_methods :x_changed
  end

  Jean Boussier

Active Record

• Symbol is allowed by default for YAML columns

  Étienne Barrié

• Fix ActiveRecord::Store to serialize as a regular Hash

... (truncated)

Commits

• 8015c2c Version 7.0.4
• f3c345e Merge pull request #45964 from jhawthorn/server_timing_safety
• ff27758 Revert "Merge pull request #44695 from Edouard-chin/ec-tagger-logger-broadcast"
• 4d25c64 Merge pull request #45221 from jhawthorn/ac_params_eql_fix
• 8525e57 Merge pull request #45102 from feliperaul/fix_activestorage_proxy_downloads_f...
• b45f5f2 Merge pull request #45907 from eitoball/fix-typo-in-guide-configureing
• fae93e0 Merge pull request #45928 from Shopify/rails-error-doc
• 670ad8d Merge pull request #45891 from Cofense/active-record-validations-guide-intern...
• 1a81cf1 Merge pull request #45900 from yahonda/lock_que_version
• 76df62d Merge pull request #45903 from skipkayhil/backport-45851
• Additional commits viewable in compare view

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