Updated CI/CD

Author: FlorianRappl

.github/workflows/ci.yml

@@ -49,6 +49,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    
+    - uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: | 
+          3.1.x
+          5.0.x
+          6.0.x
 
     - name: Build
       run: ./build.sh
@@ -58,6 +65,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    
+    - uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: | 
+          3.1.x
+          5.0.x
+          6.0.x
 
     - name: Build
       run: |