Replace coveralls with codecov

Also setup the codecov configuration file.

.github/codecov.yml

@@ -0,0 +1,20 @@
+---
+codecov:
+  branch: main
+
+# https://docs.codecov.com/docs/pull-request-comments#disable-comment
+comment: false
+
+# https://docs.codecov.com/docs/commit-status
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 3
+        paths:
+          - "socs/"
+    patch: false
+
+# When modifying this file, please validate using
+# curl -X POST --data-binary @codecov.yml https://codecov.io/validate

.github/workflows/pytest.yml

@@ -64,15 +64,11 @@ jobs:
 
     # Coverage
     - name: Report test coverage
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: |
         mv ./tests/.coverage.* ./
-        pip install -U coveralls
         coverage combine
         coverage xml
         coverage report
-        coveralls --service=github
 
     - name: Upload results to Codecov
       uses: codecov/codecov-action@v4

README.rst

@@ -125,8 +125,8 @@ This project is licensed under the BSD 2-Clause License - see the
 .. _LICENSE.txt: https://github.com/simonsobs/socs/blob/main/LICENSE.txt
 
 
-.. |coverage| image:: https://coveralls.io/repos/github/simonsobs/socs/badge.svg
-    :target: https://coveralls.io/github/simonsobs/socs
+.. |coverage| image:: https://codecov.io/gh/simonsobs/socs/graph/badge.svg?token=07SF75W0AZ
+    :target: https://codecov.io/gh/simonsobs/socs
 
 .. |docker| image:: https://img.shields.io/badge/dockerhub-latest-blue
     :target: https://hub.docker.com/r/simonsobs/socs