bbatsov/rubocop

### New features

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

### Bug fixes

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

### Changes

* [#7868](https://github.com/rubocop/rubocop/pull/7868): **(Breaking)** Extensive refactoring of internal classes `Team`, `Commissioner`, `Corrector`. `Cop::Cop#corrections` not completely compatible. See Upgrade Notes. ([@marcandre][])
* [#8156](https://github.com/rubocop/rubocop/issues/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](https://github.com/rubocop/rubocop/pull/8207): **(Breaking)** Order for gems names now disregards underscores and dashes unless `ConsiderPunctuation` setting is set to `true`. ([@marcandre][])
* [#8211](https://github.com/rubocop/rubocop/pull/8211): `Style/ClassVars` cop now detects `class_variable_set`. ([@biinari][])
* [#8245](https://github.com/rubocop/rubocop/pull/8245): Detect top-level constants like `::Const` in various cops. ([@biinari][])

[@marcandre]: https://github.com/marcandre
[@fatkodima]: https://github.com/fatkodima
[@koic]: https://github.com/koic
[@CamilleDrapier]: https://github.com/CamilleDrapier
[@owst]: https://github.com/owst
[@karlwithak]: https://github.com/karlwithak
[@deivid-rodriguez]: https://github.com/deivid-rodriguez
[@biinari]: https://github.com/biinari