dotnet 7.0 (#47)

now, dotnet 7

Author: chayim

.github/workflows/integration.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        dotnet-version: ['6.0.x']
+        dotnet-version: ['6.0.x', '7.0.x']
     steps:
       - uses: actions/checkout@v3
       - name: install dotnet tools