docs: Add a CHANGELOG.md

Author: williamdes

CHANGELOG.md

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+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## [v1.4.0]
+
+- Support laravel 7
+- Re-write ci to use GitHub actions
+- Update package to @code-lts
+- Replace coveralls by codecov
+- Remove composer lock file
+- Make test suite run from phpunit 5 to 9
+- Update README.md
+- Add a CHANGELOG.md
+- Add a `.gitattributes` file
+
+## [v1.3.1]
+
+- Allow `monolog/monolog:^2.0`
+
+## [v1.3.0]
+
+- Support laravel 6
+- Use `Illuminate\Support\Str` functions instead of helpers
+- Improve the README.md