build: Update Codecov action and add coverage badge

.github/workflows/main.yml

@@ -31,12 +31,16 @@ jobs:
         run: poetry install
 
       - name: Test with pytest
-        run: poetry run pytest
+        run: pytest --cov=./ --cov-report=xml
 
       - name: Use Codecov to track coverage
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v3
         with:
-          file: ./coverage.xml
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage.xml
+          fail_ci_if_error: true # optional (default = false)
+          verbose: true # optional (default = false)
+          name: codecov-umbrella
 
       - name: Build documentation
         run: poetry run make html --directory docs/

README.md

@@ -1,5 +1,7 @@
 [![PyTests](https://github.com/jjjermiah/NBIA-toolkit/actions/workflows/main.yml/badge.svg)](https://github.com/jjjermiah/NBIA-toolkit/actions/workflows/main.yml)
 [![Documentation Status](https://readthedocs.org/projects/nbia-toolkit/badge/?version=latest)](https://nbia-toolkit.readthedocs.io/en/latest/?badge=latest)
+[![codecov](https://codecov.io/gh/jjjermiah/NBIA-toolkit/graph/badge.svg?token=JKREY71D0R)](https://codecov.io/gh/jjjermiah/NBIA-toolkit)
+
 
 # NBIA Toolkit 
 A python package that provides programmatic access to query and download images from the National Biomedical Imaging Archive (**NBIA**) and The Cancer Imaging Archive (**TCIA**) databases.