Update CHANGELOG.md for 0.10.1
# Changelog
+## 0.10.1
+ - Add `Itertools::contains` (#514)
+ - Add `Itertools::counts_by` (#515)
+ - Add `Itertools::partition_result` (#511)
+ - Add `Itertools::all_unique` (#241)
+ - Add `Itertools::duplicates` and `Itertools::duplicates_by` (#502)
+ - Add `chain!` (#525)
+ - Add `Itertools::at_most_one` (#523)
+ - Add `Itertools::flatten_ok` (#527)
+ - Add `EitherOrBoth::or_default` (#583)
+ - Add `Itertools::find_or_last` and `Itertools::find_or_first` (#535)
+ - Implement `FusedIterator` for `FilterOk`, `FilterMapOk`, `InterleaveShortest`, `KMergeBy`, `MergeBy`, `PadUsing`, `Positions`, `Product` , `RcIter`, `TupleWindows`, `Unique`, `UniqueBy`, `Update`, `WhileSome`, `Combinations`, `CombinationsWithReplacement`, `Powerset`, `RepeatN`, and `WithPosition` (#550)
+ - Implement `FusedIterator` for `Interleave`, `IntersperseWith`, and `ZipLongest` (#548)
+
## 0.10.0
- **Increase minimum supported Rust version to 1.32.0**
- Improve macro hygiene (#507)
