### New features

* [#141](https://github.com/rubocop/rubocop-performance/pull/141): Add new `Performance/RedundantStringChars` cop. ([@fatkodima][])
* [#127](https://github.com/rubocop/rubocop-performance/pull/127): Add new `Performance/IoReadlines` cop. ([@fatkodima][])
* [#128](https://github.com/rubocop/rubocop-performance/pull/128): Add new `Performance/ReverseFirst` cop. ([@fatkodima][])
* [#132](https://github.com/rubocop/rubocop-performance/issues/132): Add new `Performance/RedundantSortBlock` cop. ([@fatkodima][])
* [#125](https://github.com/rubocop/rubocop-performance/pull/125): Support `Array()` and `Hash()` methods for `Performance/Size` cop. ([@fatkodima][])
* [#124](https://github.com/rubocop/rubocop-performance/pull/124): Add new `Performance/Squeeze` cop. ([@fatkodima][])
* [#129](https://github.com/rubocop/rubocop-performance/pull/129): Add new `Performance/BigDecimalWithNumericArgument` cop. ([@fatkodima][])
* [#130](https://github.com/rubocop/rubocop-performance/pull/130): Add new `Performance/SortReverse` cop. ([@fatkodima][])
* [#81](https://github.com/rubocop/rubocop-performance/issues/81): Add new `Performance/StringInclude` cop. ([@fatkodima][])
* [#123](https://github.com/rubocop/rubocop-performance/pull/123): Add new `Performance/AncestorsInclude` cop. ([@fatkodima][])
* [#125](https://github.com/rubocop/rubocop-performance/pull/125): Support `Range#member?` method for `Performance/RangeInclude` cop. ([@fatkodima][])

### Changes

* [#138](https://github.com/rubocop/rubocop-performance/pull/138): Drop support for RuboCop 0.81 or lower. ([@koic][])

[@fatkodima]: https://github.com/fatkodima
[@koic]: https://github.com/koic
