fix: coveralls housekeeping

Author: milsanore

.github/workflows/build.yml

@@ -64,9 +64,15 @@ jobs:
           cmake --preset=debug
           cmake --build --preset=debug
           ctest --preset=debug
-          lcov --gcov-tool gcov --capture --directory . --output-file lcov.info --rc geninfo_unexecuted_blocks=1 --ignore-errors mismatch
+          lcov --gcov-tool gcov \
+            --capture \
+            --directory . \
+            --output-file lcov.info \
+            --rc geninfo_unexecuted_blocks=1 \
+            --ignore-errors mismatch
+          lcov --remove lcov.info '/home/*' '/usr/*' 'tests/*' --output-file lcov_filtered.info
 
       - name: Upload coverage to Coveralls
         uses: coverallsapp/github-action@v2
         with:
-          path-to-lcov: lcov.info
+          path-to-lcov: lcov_filtered.info