Create CHANGELOG.md

create a changelog and backfill with all historical changes

Author: chrisbolin

CHANGELOG.md

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+# Changelog
+
+## 2.0.4 (2018-11-09)
+
+- [#39](https://github.com/FormidableLabs/react-fast-compare/pull/39). Fix `react-native` bug introduced by DOM element checking.
+
+## 2.0.3 (2018-11-08)
+
+- [#33](https://github.com/FormidableLabs/react-fast-compare/pull/33). Add handling for DOM elements. Thanks @viper1104!
+
+## 2.0.2 (2018-08-21)
+
+- [#28](https://github.com/FormidableLabs/react-fast-compare/pull/28). Fix for localized versions of IE11. Thanks @excentrik!
+- [#34](https://github.com/FormidableLabs/react-fast-compare/pull/34). Fix typo. Thanks @Marviel! 
+
+## 2.0.1 (2018-06-25)
+
+- [#26](https://github.com/FormidableLabs/react-fast-compare/pull/26). Remove `_store` check. Thanks @chen-ye!
+
+**Major bugfix:** Fixes `RangeError` in production, [#25](https://github.com/FormidableLabs/react-fast-compare/issues/25)
+
+## 2.0.0 (2018-06-04)
+
+- [#21](https://github.com/FormidableLabs/react-fast-compare/pull/21). Upgrade to `fast-deep-equal@2.0.1`. Thanks @samwhale!
+
+**Breaking changes:**
+- `null` and `Object` comparison
+- new behavior: functions are no longer treated as equal
+- new behavior: handle `NaN`
+
+## 1.0.0 (2018-04-12)
+
+- Initial release. forked from `fast-deep-equal@1.1.0`