Added github nuget publish step

Author: SeanoNET

.github/workflows/release.yml

@@ -19,7 +19,13 @@ jobs:
       run: dotnet build --configuration Release /p:Version=${VERSION}
     - name: Test
       run: dotnet test --configuration Release /p:Version=${VERSION} --no-build
-    - name: Publish FroniusSolarClient
+    - name: Pack
+      run: dotnet pack --configuration Release /p:Version=${VERSION} --no-build --output .
+    - name: Push
+      run: dotnet nuget push FroniusSolarClient.Core.${VERSION}.nupkg --source https://nuget.pkg.github.com/acraven/index.json --api-key ${GITHUB_TOKEN}
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    - name: Publish FroniusSolarClient nuget
       uses: brandedoutcast/publish-nuget@v2.5.2
       with:
           PROJECT_FILE_PATH: FroniusSolarClient/FroniusSolarClient.csproj