Update changelog for 0.13.0 (#149)

CHANGELOG.md

@@ -9,14 +9,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- Add method of overriding the /sys/fs/cgroup hierarchy, for reading cgroup metrics inside Docker [#148](https://github.com/elastic/gosigar/pull/148)
-
 ### Fixed
 
 ### Changed
 
 ### Deprecated
 
+## [0.13.0]
+
+### Added
+
+- Add method of overriding the /sys/fs/cgroup hierarchy, for reading cgroup metrics inside Docker [#148](https://github.com/elastic/gosigar/pull/148)
+
 ## [0.12.0]
 
 ### Added
@@ -174,7 +178,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed `ProcStatus.PPID` value is wrong on Windows. [#55](https://github.com/elastic/gosigar/pull/55)
 - Fixed `ProcStatus.Username` error on Windows XP [#56](https://github.com/elastic/gosigar/pull/56)
 
-[Unreleased]: https://github.com/elastic/gosigar/compare/v0.12.0...HEAD
+[Unreleased]: https://github.com/elastic/gosigar/compare/v0.13.0...HEAD
 [0.12.0]: https://github.com/elastic/gosigar/releases/tag/v0.12.0
 [0.11.0]: https://github.com/elastic/gosigar/releases/tag/v0.11.0
 [0.10.5]: https://github.com/elastic/gosigar/releases/tag/v0.10.5