tweaks

Author: smoothdeveloper

.github/workflows/dotnet-core.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 2.1.402
+        dotnet-version: 2.1.811
 
     - name: Build
       env:

appveyor.yml

@@ -1,6 +1,6 @@
 init:
   - git config --global core.autocrlf input
-image: Visual Studio 2017
+image: Visual Studio 2019
 build_script:
   - cmd: build.cmd GenerateDocs
 test: off