Release version 1.3.1 (#18)

* Preparing release v1.3.1

* Update CHANGELOG.md

Co-authored-by: GitHub actions <noreply@github.com>
Co-authored-by: Nguyen Damien <ngn.damien@gmail.com>

Author: 3 people

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.3.1] - 2021-07-27
+
 ### Updated
 
 -   Update unit tests for `os.open()`
@@ -67,7 +69,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Initial release
 
-[Unreleased]: https://github.com/Takishima/pylint-secure-coding-standard/compare/v1.3.0...HEAD
+[Unreleased]: https://github.com/Takishima/pylint-secure-coding-standard/compare/v1.3.1...HEAD
+
+[1.3.1]: https://github.com/Takishima/pylint-secure-coding-standard/compare/v1.3.0...v1.3.1
 
 [1.3.0]: https://github.com/Takishima/pylint-secure-coding-standard/compare/v1.2.1...v1.3.0