test install 2.2 sdk

Author: thangchung

appveyor.yml

@@ -1,6 +1,4 @@
 image: Visual Studio 2017
-install:
-- appveyor DownloadFile https://dist.nuget.org/win-x86-commandline/latest/nuget.exe
 
 branches:
   only:
@@ -36,7 +34,7 @@ before_build:
   - cmd: dotnet restore --verbosity m
 
 build_script:
-  #- ps: choco install dotnetcore-sdk --no-progress --confirm --version 2.1.403
+  - ps: choco install dotnetcore-sdk --no-progress --confirm --version 2.2.100
   - ps: ./build.ps1
 
 test: off