move to 2019 image for appveyor

Mpdreamz · Mpdreamz · commit 92209815759d · 2020-05-25T11:44:51.000+02:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -1,5 +1,5 @@
 version: 1.0.{build} 
-image: Visual Studio 2017
+image: Visual Studio 2019
 test: off
 environment:
     DOTNET_CLI_TELEMETRY_OPTOUT: true
