Add changelog for v1.3.1

Author: stevegrunwell

CHANGELOG.md

@@ -1,31 +1,42 @@
 # 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).
 
+## [1.3.1] — 2020-01-14
+
+* Fix PHPUnit warnings regarding `assertContains()` and `assertRegExp()`. Props [@jakobbuis](https://github.com/jakobbuis) ([#20], [#27], [#28])
+* Refactor the internal test scaffolding, including a move from Travis CI to GitHub Actions. Props [@peter279k](https://github.com/peter279k) for the assist with GitHub Actions ([#24])
+* Added PHP 8.0 support ([#26])
+
 ## [1.3.0] — 2020-01-27
 
-* Replace `zendframework/zend-dom` with `laminas/laminas-dom` ([#16]).
-* Update Composer dependencies, add a `composer test` script ([#15]).
+* Replace `zendframework/zend-dom` with `laminas/laminas-dom` ([#16])
+* Update Composer dependencies, add a `composer test` script ([#15])
+
 
 ## [1.2.0] - 2018-03-27
 
 * Bumped the minimum version of zendframework/zend-dom to 2.7, which includes a fix for attribute values that include spaces ([#13]).
 
+
 ## [1.1.0] - 2018-01-14
 
-* Added the `assertElementContains()`, `assertElementNotContains()`, `assertElementRegExp()`, and `assertElementNotRegExp()` assertions, for verifying the contents of elements that match the given DOM query ([#6]).
-* Moved the `Tests` namespace into a development-only autoloader, to prevent them from potentially being included in projects using this library ([#7]).
-* [Based on this article by Martin Hujer](https://blog.martinhujer.cz/17-tips-for-using-composer-efficiently/#tip-%236%3A-put-%60composer.lock%60-into-%60.gitignore%60-in-libraries), remove the `composer.lock` file from the library ([#8]).
-* _Lower_ the minimum version of [zendframework/zend-dom](https://packagist.org/packages/zendframework/zend-dom) to 2.2.5 for maximum portability ([#9]).
+* Added the `assertElementContains()`, `assertElementNotContains()`, `assertElementRegExp()`, and `assertElementNotRegExp()` assertions, for verifying the contents of elements that match the given DOM query ([#6])
+* Moved the `Tests` namespace into a development-only autoloader, to prevent them from potentially being included in projects using this library ([#7])
+* [Based on this article by Martin Hujer](https://blog.martinhujer.cz/17-tips-for-using-composer-efficiently/#tip-%236%3A-put-%60composer.lock%60-into-%60.gitignore%60-in-libraries), remove the `composer.lock` file from the library ([#8])
+* _Lower_ the minimum version of [zendframework/zend-dom](https://packagist.org/packages/zendframework/zend-dom) to 2.2.5 for maximum portability ([#9])
+
 
 ## [1.0.0] - 2017-10-24
 
 * Initial release of the PHPUnit Markup Assertions Composer package.
 
 
 [Unreleased]: https://github.com/stevegrunwell/phpunit-markup-assertions/compare/master...develop
+[1.3.1]: https://github.com/stevegrunwell/phpunit-markup-assertions/releases/tag/v1.3.1
 [1.3.0]: https://github.com/stevegrunwell/phpunit-markup-assertions/releases/tag/v1.3.0
 [1.2.0]: https://github.com/stevegrunwell/phpunit-markup-assertions/releases/tag/v1.2.0
 [1.1.0]: https://github.com/stevegrunwell/phpunit-markup-assertions/releases/tag/v1.1.0
@@ -37,3 +48,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 [#13]: https://github.com/stevegrunwell/phpunit-markup-assertions/issues/13
 [#15]: https://github.com/stevegrunwell/phpunit-markup-assertions/pull/15
 [#16]: https://github.com/stevegrunwell/phpunit-markup-assertions/issues/16
+[#20]: https://github.com/stevegrunwell/phpunit-markup-assertions/pull/20
+[#24]: https://github.com/stevegrunwell/phpunit-markup-assertions/pull/24
+[#26]: https://github.com/stevegrunwell/phpunit-markup-assertions/pull/26
+[#27]: https://github.com/stevegrunwell/phpunit-markup-assertions/pull/27
+[#28]: https://github.com/stevegrunwell/phpunit-markup-assertions/pull/28