Update readme badge + remove travis config yaml

Author: LudwigCRON

.travis.yml

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2020 Ludwig CRON
+Copyright (c) 2022 Ludwig CRON
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

LICENSE

@@ -3,7 +3,7 @@
 ![](https://img.shields.io/badge/license-MIT-blue)
 ![](https://img.shields.io/badge/python-3.7+-blue)
 ![](https://64-166642218-gh.circle-artifacts.com/0/tests/outputs/cov_badge.svg)
-[![CircleCI](https://circleci.com/gh/LudwigCRON/undulate/tree/architecture_update.svg?style=shield)](https://circleci.com/gh/LudwigCRON/undulate/tree/architecture_update)<br/>
+[![CircleCI](https://circleci.com/gh/LudwigCRON/undulate/tree/master.svg?style=shield)](https://circleci.com/gh/LudwigCRON/undulate/tree/master)<br/>
 
 ## Introduction