Add changelog

Author: kinow

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - [179](https://github.com/Smashing/smashing/pull/179) Replace Travis CI by GH actions
 - [178](https://github.com/Smashing/smashing/pull/178) Relax dependencies; pinned minor, free patch version (thanks @dylanratcliffe)
+- [173](https://github.com/Smashing/smashing/pull/173) Send only data that is needed on the dashboard (thanks @toy)
 
 ## 2021-01-30 - 1.3.1