Update AppVeyor builds:

Use VS2019 as AppVeyor environment
Generate artifact in AppVeyor
Avoid extension deployment on AppVeyor

Author: igitur

GenerateCppFiltersExtension/GenerateCppFiltersExtension.csproj

@@ -12,6 +12,7 @@
     <UpgradeBackupLocation>
     </UpgradeBackupLocation>
     <OldToolsVersion>15.0</OldToolsVersion>
+    <DeployExtension Condition="'$(AppVeyor)' != ''">False</DeployExtension>
   </PropertyGroup>
   <PropertyGroup>
     <SignAssembly>true</SignAssembly>

appveyor.yml

@@ -1,24 +1,17 @@
-version: "1.50.{build}"
+version: 1.50.{build}
 
-#vc150
-os: Visual Studio 2017
+image: Visual Studio 2019
+
+before_build:
+- cmd: nuget restore
 
 configuration:
-  - Debug
   - Release
 
-init:
-  - set PATH=C:\Program Files (x86)\MSBuild\15.0\Bin;%PATH%
-  - cmd: msbuild /version
-
-clone_folder: C:\projects\GenerateCppFiltersExtension
-
 build:
-  project: $(APPVEYOR_BUILD_FOLDER)\GenerateCppFiltersExtension.sln
-  parallel: true
-  verbosity: normal
+  verbosity: minimal
+
+artifacts:
+- path: '**\*.vsix'
 
-before_build:
-  - nuget restore GenerateCppFiltersExtension.sln -Verbosity quiet
 
-test: off