simpler build

.github/workflows/main-build.yml

@@ -2,9 +2,14 @@ name: GitHub action build
 on: push
 
 jobs:
-  Main-build_windows:
+  main-build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
 
-    runs-on: ubuntu-latest
     steps:
     - name: GIT checkout
       uses: actions/checkout@v4
@@ -23,3 +28,29 @@ jobs:
         else
           ./dotnet_build.sh
          fi
+
+         - name: Upload test coverage to Coveralls
+         uses: coverallsapp/github-action@v2
+         with:
+           format: lcov
+           files: coverage.net8.info coverage.net48.info
+   
+    - name: Upload NuGet packages
+      uses: actions/upload-artifact@v4
+      if: runner.os == 'Linux'
+      with:
+        name: NuGet packages
+        path: release\Fastenshtein.*.*upkg
+
+    - name: Upload code coverage
+      uses: actions/upload-artifact@v4
+      if: runner.os == 'Linux'
+      with:
+        name: code coverage
+        path: release/coverage.*.info
+
+    - name: Upload dotnet info
+      uses: actions/upload-artifact@v4
+      if: runner.os == 'Linux'
+      with:
+        path: release/dotnet_info.txt