docs: update changelog

Author: robjtede

CHANGELOG.md

@@ -2,21 +2,6 @@
 
 ## Unreleased
 
-## 0.1.3
-
-- No significant changes since `0.1.2`.
-
-## 0.1.2
-
-- No significant changes since `0.1.1`.
-
-## 0.1.1
-
-- Implement `PartialEq<False>` for `True`, and vice-versa.
-- Implement `PartialEq<bool>` for `True` and `False`.
-- Implement `PartialEq<{True, False}>` for `bool`.
-- Mark crate as `#![no_std]`.
-
 ## 0.1.0
 
-- Initial release with `True` and `False` types.
+- Initial release with `DoubleInt` type.