Merge pull request #76 from UBC-MDS/fix/codecov-coverage

CI: Add Codecov coverage upload

Author: rahiqraees

.github/workflows/build.yml

@@ -31,4 +31,9 @@ jobs:
 
       - name: Run tests with coverage
         run: |
-          pytest --cov --cov-report=term --cov-branch
+          pytest --cov --cov-report=term --cov-report=xml --cov-branch
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}