New features

• #7868: Cop::Base is the new recommended base class for cops. (@marcandre)
• #3983: Add new Style/AccessorGrouping cop. (@fatkodima)
• #8244: Add new Style/BisectedAttrAccessor cop. (@fatkodima)
• #7458: Add new AsciiConstants option for Naming/AsciiIdentifiers. (@fatkodima)
• #7373: Add new Style/RedundantAssignment cop. (@fatkodima)
• #8213: Permit to specify TargetRubyVersion 2.8 (experimental). (@koic)
• #8159: Add new CountAsOne option for code length related Metric cops. (@fatkodima)
• #8164: Support auto-correction for Lint/InterpolationCheck. (@koic)
• #8223: Support auto-correction for Style/IfUnlessModifierOfIfUnless. (@koic)
• #8172: Support auto-correction for Lint/SafeNavigationWithEmpty. (@koic)

Bug fixes

• #8039: Fix false positives for Lint/ParenthesesAsGroupedExpression in when using operators or chain functions. (@CamilleDrapier)
• #8196: Fix a false positive for Style/RedundantFetchBlock when using with Rails.cache. (@fatkodima)
• #8195: Fix an error for Style/RedundantFetchBlock when using #fetch with empty block. (@koic)
• #8193: Fix a false positive for Style/RedundantRegexpCharacterClass when using [\b]. (@owst)
• #8205: Fix a false positive for Style/RedundantRegexpCharacterClass when using a leading escaped ]. (@owst)
• #8208: Fix Style/RedundantParentheses with hash literal as first argument to yield. (@karlwithak)
• #8176: Don't load .rubocop.yml from personal folders to check for exclusions if there's a project configuration. (@deivid-rodriguez)

Changes

• #7868: (Breaking) Extensive refactoring of internal classes Team, Commissioner, Corrector. Cop::Cop#corrections not completely compatible. See Upgrade Notes. (@marcandre)
• #8156: (Breaking) rubocop -a / --autocorrect no longer run unsafe corrections; rubocop -A / --autocorrect-all run both safe and unsafe corrections. Options --safe-autocorrect is deprecated. (@marcandre)
• #8207: (Breaking) Order for gems names now disregards underscores and dashes unless ConsiderPunctuation setting is set to true. (@marcandre)
• #8211: Style/ClassVars cop now detects class_variable_set. (@biinari)
• #8245: Detect top-level constants like ::Const in various cops. (@biinari)