Update changelog

Author: stevegeek

CHANGELOG.md

@@ -1,6 +1,18 @@
 ## [Unreleased]
 
+## [2.0.0.alpha1] - unreleased
+
+### Breaking changes
+
+- `ReversibleId` now no longer downcases the encodedid input string by default on decode, ie the `decode` option `downcase` is now `false`. In a future release the `downcase` option will be removed.
+
+## [1.0.0.rc3] - 2023-10-23
+
 - Add an optional `max_length` argument to `ReversibleId`, thanks to [@jugglebird](https://github.com/jugglebird)
+- Alphabet validations to prevent whitespace and null chars
+- Add `Alphabet#to_a`, `Alphabet#to_s`, `Alphabet#size` and a custom `Alphabet#inspect`
+- Fixes to input validations
+- hashids are case-sensitive, as are `Alphabet`s, however `ReversibleId` was always `downcase`ing the encodedid input string on decode. A new option has been added to `decode` and `decode_hex`, `downcase`, which defaults to `true`. Thus, the default behaviour is unchanged, but you can opt out to allow mixed case encodedid decode. *Note:* In V2 this will default to `false`.
 
 ## [1.0.0.rc2] - 2023-08-07