Don't allow coverage steps to influence the test status

Author: andreasnoack

.github/workflows/ci.yml

@@ -44,7 +44,9 @@ jobs:
       - uses: julia-actions/julia-runtest@latest
         continue-on-error: ${{ matrix.version == 'nightly' }}
       - uses: julia-actions/julia-processcoverage@v1
+        continue-on-error: true
       - uses: codecov/codecov-action@v1
+        continue-on-error: true
         with:
           file: ./lcov.info
           flags: unittests