Enable CODECOV_TOKEN in ci

Author: eddelbuettel

.github/workflows/ci.yaml

@@ -47,6 +47,8 @@ jobs:
       - name: Test
         run: ./run.sh run_tests
 
-      #- name: Coverage
-      #  if: ${{ matrix.os == 'ubuntu-latest' }}
-      #  run: ./run.sh coverage
+      - name: Coverage
+        if: ${{ matrix.os == 'ubuntu-latest' }}
+        run: ./run.sh coverage
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}