Fix the CHANGELOG

CHANGELOG.md

@@ -13,18 +13,23 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
-## [0.13.0] - 2020-10-10
+## [Unreleased]
 
 ### Added
-- In the configuration, `root_certificates` has been added to the `global` and `endpoint` sections as an array of strings representing the path to root certificate files.
-- At compilation, it is now possible to statically link OpenSSL using the `openssl_vendored` feature.
-- In the Makefile, it is now possible to specify which target triple to build for.
 - Add proxy support through the `HTTP_PROXY`, `HTTPS_PROXY` and `NO_PROXY` environment variables.
 
 ### Changed
 - The minimal required Rust version is 1.42.0.
 
 
+## [0.13.0] - 2020-10-10
+
+### Added
+- In the configuration, `root_certificates` has been added to the `global` and `endpoint` sections as an array of strings representing the path to root certificate files.
+- At compilation, it is now possible to statically link OpenSSL using the `openssl_vendored` feature.
+- In the Makefile, it is now possible to specify which target triple to build for.
+
+
 ## [0.12.0] - 2020-09-26
 
 ### Added