Fix CI

Author: walterlv

.github/workflows/dotnet-build.yml

@@ -14,13 +14,10 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: |
-          3.1.x
-          5.0.x
-          6.0.x
-          7.0.x
+          8.0.x
 
     - name: Build with dotnet
       run: dotnet build --configuration Release
 
     - name: Test
-      run: dotnet test --configuration Release
+      run: dotnet test --configuration Release

.github/workflows/nuget-master-publish.yml

@@ -1,6 +1,6 @@
 name: publish nuget
 
-on: 
+on:
   push:
     tags:
     - '*'
@@ -17,10 +17,7 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: |
-          3.1.x
-          5.0.x
-          6.0.x
-          7.0.x
+          8.0.x
 
     - name: Install dotnet tool
       run: dotnet tool install -g dotnetCampus.TagToVersion