updated to simpler appveyor.yml

appveyor.yml

@@ -1,44 +1,14 @@
 version: 1.5.0.{build}
 
-environment:
-  packageVersion: 1.5.0
-
-init:
-- ps: $env:buildVersion = "$env:packageVersion.$env:appveyor_build_number"
-- ps: $env:nugetVersion = "$env:packageVersion"
-- ps: Update-AppveyorBuild -Version $env:buildVersion
-
-assembly_info:
-  patch: true
-  file: '**\AssemblyInfo.*'
-  assembly_version: '$(buildVersion)'
-  assembly_file_version: '$(buildVersion)'
-  assembly_informational_version: '$(nugetVersion)'
-
-configuration: Release
-
-nuget:
-  account_feed: true
-  project_feed: true
-  disable_publish_on_pr: true
+image: Visual Studio 2019
 
 before_build:
-- nuget restore
+- cmd: dotnet restore
 
 build:
   verbosity: minimal
 
-after_build:
-- ps: nuget pack dotMath.nuspec -version "$env:nugetVersion"
-
-artifacts:
-- path: 'dotMath*.nupkg'
-  name: nuget-package
-
 deploy:
 - provider: NuGet
   api_key:
     secure: F9stGuIbUQoboJuAGMkMUULJMKhuR546Cd5vAZhToh2yoNuOF6z2E8flGI0b2fET
-  artifact: nuget-package
-  on:
-    branch: master