Update Buld Script and Appveyor

Author: rafaelsc

Build.ps1

@@ -1,9 +1,12 @@
-Write-Host "build: Build started"
+Write-Output "build: Build started"
+
+& dotnet --info
+& dotnet --list-sdks
 
 Push-Location $PSScriptRoot
 
 if(Test-Path .\artifacts) {
-    Write-Host "build: Cleaning .\artifacts"
+    Write-Output "build: Cleaning .\artifacts"
 	Remove-Item .\artifacts -Force -Recurse
 }
 
@@ -15,13 +18,13 @@ $suffix = @{ $true = ""; $false = "$($branch.Substring(0, [math]::Min(10,$branch
 $commitHash = $(git rev-parse --short HEAD)
 $buildSuffix = @{ $true = "$($suffix)-$($commitHash)"; $false = "$($branch)-$($commitHash)" }[$suffix -ne ""]
 
-Write-Host "build: Package version suffix is $suffix"
-Write-Host "build: Build version suffix is $buildSuffix" 
+Write-Output "build: Package version suffix is $suffix"
+Write-Output "build: Build version suffix is $buildSuffix" 
 
 foreach ($src in Get-ChildItem src/*) {
     Push-Location $src
 
-    Write-Host "build: Packaging project in $src"
+    Write-Output "build: Packaging project in $src"
 
     & dotnet build -c Release --version-suffix=$buildSuffix
     if ($suffix) {
@@ -37,7 +40,7 @@ foreach ($src in Get-ChildItem src/*) {
 foreach ($sample in Get-ChildItem sample/*) {
     Push-Location $sample
 
-    Write-Host "build: Testing project in $sample"
+    Write-Output "build: Testing project in $sample"
 
     & dotnet build -c Release --version-suffix=$buildSuffix
     if($LASTEXITCODE -ne 0) { exit 3 }
@@ -48,7 +51,7 @@ foreach ($sample in Get-ChildItem sample/*) {
 foreach ($test in Get-ChildItem test/*.Tests) {
     Push-Location $test
 
-	Write-Host "build: Testing project in $test"
+	Write-Output "build: Testing project in $test"
 
     & dotnet test -c Release
     if($LASTEXITCODE -ne 0) { exit 3 }

appveyor.yml

@@ -1,6 +1,8 @@
 version: '{build}'
 skip_tags: true
-image: Visual Studio 2017
+image:
+  - Visual Studio 2019
+  - Ubuntu
 configuration: Release
 test: off
 build_script: