Switch to codecov (#573)

* Delete .coveralls.yml

* Update pipeline.yml

* Update README.md

Author: jan-janssen

.coveralls.yml

@@ -234,8 +234,10 @@ jobs:
       env:
         EXECUTORLIB_PMIX: "pmix"
         TMPDIR: "/tmp"   # required by MacOs https://github.com/open-mpi/ompi/issues/7393
-    - name: Coveralls
-      uses: coverallsapp/github-action@v2
+    - name: Upload coverage reports to Codecov
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
 
   unittest_mpich:
     needs: [black]
@@ -380,4 +382,4 @@ 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

@@ -1,6 +1,6 @@
 # executorlib
 [![Pipeline](https://github.com/pyiron/executorlib/actions/workflows/pipeline.yml/badge.svg)](https://github.com/pyiron/executorlib/actions/workflows/pipeline.yml)
-[![Coverage Status](https://coveralls.io/repos/github/pyiron/executorlib/badge.svg?branch=main)](https://coveralls.io/github/pyiron/executorlib?branch=main)
+[![codecov](https://codecov.io/gh/pyiron/executorlib/graph/badge.svg?token=KFIO3R08H3)](https://codecov.io/gh/pyiron/executorlib)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/pyiron/executorlib/HEAD?labpath=notebooks%2Fexamples.ipynb)
 
 Up-scale python functions for high performance computing (HPC) with executorlib.