react to removal of PlatformAbstractions (#356)

NuGet.config

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <add key="AspNetCore" value="https://dotnet.myget.org/F/aspnetcore-ci-dev/api/v3/index.json" />

test/Microsoft.AspNetCore.Localization.FunctionalTests/Microsoft.AspNetCore.Localization.FunctionalTests.csproj

@@ -14,7 +14,6 @@
     <PackageReference Include="Microsoft.AspNetCore.Server.IntegrationTesting" Version="$(AspNetIntegrationTestingVersion)" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="$(AspNetCoreVersion)" />
     <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="$(AspNetCoreVersion)" />
-    <PackageReference Include="Microsoft.Extensions.PlatformAbstractions" Version="$(AspNetCoreVersion)" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
     <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitVersion)" />

test/Microsoft.AspNetCore.Localization.FunctionalTests/TestRunner.cs

@@ -1,5 +1,5 @@
-// Copyright (c) .NET Foundation. All rights reserved. 
-// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information. 
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
 using System.IO;
@@ -8,7 +8,6 @@ using System.Net.Http;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Server.IntegrationTesting;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.PlatformAbstractions;
 using Xunit;
 
 namespace Microsoft.AspNetCore.Localization.FunctionalTests
@@ -19,7 +18,7 @@ namespace Microsoft.AspNetCore.Localization.FunctionalTests
 
         public TestRunner(string applicationPath)
         {
-            _applicationPath = Path.Combine(ResolveRootFolder(PlatformServices.Default.Application.ApplicationBasePath), applicationPath);
+            _applicationPath = Path.Combine(ResolveRootFolder(AppContext.BaseDirectory), applicationPath);
         }
 
         private static string ResolveRootFolder(string projectFolder)