Switch to codecov (#388)

* Delete .coveralls.yml

* Update pipeline.yml

* Update README.md

Author: jan-janssen

.coveralls.yml

@@ -71,8 +71,10 @@ jobs:
       - name: Collect Coverage
         shell: bash -l {0}
         run: coverage xml
-      - name: Coveralls
-        uses: coverallsapp/github-action@v2
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
 
   minimal:
     needs: [black]
@@ -235,4 +237,4 @@ jobs:
         run: gh pr merge --auto --squash "$PR_URL"
         env:
           PR_URL: ${{github.event.pull_request.html_url}}
-          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
+          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}

.github/workflows/pipeline.yml

@@ -2,7 +2,7 @@
 
 [![Pipeline](https://github.com/pyiron/pysqa/actions/workflows/pipeline.yml/badge.svg)](https://github.com/pyiron/pysqa/actions/workflows/pipeline.yml)
 [![Documentation Status](https://readthedocs.org/projects/pysqa/badge/?version=latest)](https://pysqa.readthedocs.io/en/latest/?badge=latest)
-[![Coverage Status](https://coveralls.io/repos/github/pyiron/pysqa/badge.svg?branch=main)](https://coveralls.io/github/pyiron/pysqa?branch=main)
+[![codecov](https://codecov.io/gh/pyiron/pysqa/graph/badge.svg?token=N753OWIAUW)](https://codecov.io/gh/pyiron/pysqa)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/pyiron/pysqa/HEAD?labpath=example_config.ipynb)
 
 High-performance computing (HPC) does not have to be hard. In this context the aim of the Python Simple Queuing System