docs: added CHANGELOG.md

Author: liady

CHANGELOG.md

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+# Changelog
+All notable changes to this project will be documented in this file.
+
+## 3.0.0 (2021-04-21)
+### Added
+- Excluding Webpack 5 module federation (automatically adding to allowlist)
+
+### Changed
+- Better arguments handling for the exported function
+- Changed code syntax to ES6
+
+### Removed
+- Removed support for Node < 6
+
+## 2.5.2 (2020-08-24)
+### Changed
+- Changed exported function signature - to remove deprecation notice when used in Webpack 5
+
+## 2.5.0 (2020-07-12)
+### Added
+- Options validation - throwing an error when using a mispell of one of the options