added coveralls to gh-actions

.github/workflows/build_and_test.yml

@@ -10,6 +10,7 @@ on:
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Release
+  COVERALLS_PULL_REQUEST: ${{ github.event.number }}
 
 jobs:
   build:
@@ -64,6 +65,18 @@ jobs:
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
       run: ctest --output-on-failure -C ${{env.BUILD_TYPE}}
 
+    - name: coveralls
+      if: matrix.os == 'ubuntu-latest'
+      run: |
+        export TRAVIS_BRANCH=$GITHUB_REF_NAME && \
+        export TRAVIS_JOB_ID=$GITHUB_RUN_NUMBER && \
+        git clone https://github.com/CrowCpp/cpp-coveralls.git && \
+        cd cpp-coveralls && \
+        pip3 install . --no-input && \
+        cd .. && \
+        coveralls --verbose --exclude-pattern .*/http_parser_merged.h --exclude-pattern .*/TinySHA1.hpp
+      shell: bash
+
     #- name: Package
     #  working-directory: ${{github.workspace}}/build
     #  run: |