Add CHANGELOG

CHANGELOG.md

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+# Changelog
+
+## [0.5.0](https://github.com/brick/phonenumber/releases/tag/0.5.0) - 2023-02-23
+
+**💥 BC breaks**
+
+- Minimum PHP version is now `7.4`
+
+## [0.4.1](https://github.com/brick/phonenumber/releases/tag/0.4.1) - 2023-02-22
+
+**✨ Improvements**
+
+- Static analysis: Psalm & PHPStan -compatible annotations for `PhoneNumberType` and `PhoneNumberFormat` constants
+
+## [0.4.0](https://github.com/brick/phonenumber/releases/tag/0.4.0) - 2021-09-06
+
+✨ **New features**
+
+- `PhoneNumber::getDescription()`
+
+💥 **BC breaks**
+
+- The following classes are now `final`:
+    - `PhoneNumber`
+    - `PhoneNumberFormat`
+    - `PhoneNumberParseException`
+    - `PhoneNumberType`
+
+## [0.3.0](https://github.com/brick/phonenumber/releases/tag/0.3.0) - 2021-08-05
+
+✨ **New features**
+
+- `PhoneNumber::isEqualTo()`
+- `PhoneNumber` now implements `JsonSerializable`
+
+💥 **BC breaks**
+
+- The library now requires the `json` extension (always available as of PHP 8.0)
+
+## [0.2.2](https://github.com/brick/phonenumber/releases/tag/0.2.2) - 2020-02-06
+
+✨ **New method:** `PhoneNumber::getGeographicalAreaCode()`
+
+## [0.2.1](https://github.com/brick/phonenumber/releases/tag/0.2.1) - 2018-11-13
+
+New method: `PhoneNumber::isPossibleNumber()`
+
+Thanks @xificurk
+
+## [0.2.0](https://github.com/brick/phonenumber/releases/tag/0.2.0) - 2017-10-04
+
+Minimum PHP version is now 7.1.
+
+## [0.1.0](https://github.com/brick/phonenumber/releases/tag/0.1.0) - 2017-04-05
+
+First beta release.
+