update changelog

Author: vaibhavhrt

CHANGELOG.md

@@ -3,28 +3,28 @@
 All notable changes to the "react-github-buttons" project will be documented in this file.
 
 ## [Unreleased]
+
+## [0.5.0] 2020-10-05
+### Changed
 - Switch to yarn
+- Switch to eslint & prettier
+### Security
 - Update Dependencies
-- Drop node 8
-- remove tslint
-- switch to eslint & prettier
+### Removed
+- Drop node 8 support
 
 ## [0.4.0] 2019-6-15
 ### Added
-
 - Sponsor button
 
 ## [0.3.0] 2019-6-15
 ### Added
-
 - Used by button
 
 ## [0.2.0] 2019-6-13
 ### Added
-
 - Watch Button
 
 ## [0.1.0] 2019-6-13
 ### Added
-
 - Star and Fork button.