use DotNetCoreCLI@2 task for restore

Author: Bertk

eng/build.yml

@@ -15,8 +15,17 @@ steps:
     New-Item -ItemType Directory -Path artifacts/package/release -Force
   displayName: create folder artifacts/package/$(BuildConfiguration)
 
-- script: dotnet restore
+# Authenticate Azure DevOps NuGet feed
+- task: NuGetAuthenticate@1
+  displayName: 'Authenticate Azure DevOps NuGet feed'
+
+- task: DotNetCoreCLI@2
   displayName: Restore packages
+  inputs:
+    command: restore
+    projects: 'coverlet.sln'
+    feedsToUse: 'config'
+    nugetConfigPath: 'nuget.config'
 
 - script: dotnet build -c $(BuildConfiguration) --no-restore -bl:build.msbuild.binlog
   displayName: Build