Update all xunit packages to 2.5.3.

Author: bgrainger

src/AdoNet.Specification.Tests/AdoNet.Specification.Tests.csproj

@@ -29,7 +29,7 @@
 
   <ItemGroup>
     <PackageReference Include="xunit" Version="2.5.3" />
-    <PackageReference Include="xunit.extensibility.execution" Version="2.5.1-pre.4" />
+    <PackageReference Include="xunit.extensibility.execution" Version="2.5.3" />
     <PackageReference Include="Xunit.SkippableFact" Version="1.4.13" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
   </ItemGroup>

src/AdoNet.Specification.Tests/ConnectionTestBase.cs

@@ -247,7 +247,7 @@ public virtual async Task DisposeAsync_raises_Disposed()
 		var connection = CreateOpenConnection();
 		var disposedCount = 0;
 		connection.Disposed += (s, e) => disposedCount++;
-		await connection.DisposeAsync().ConfigureAwait(false);
+		await connection.DisposeAsync().ConfigureAwait(true);
 		Assert.Equal(1, disposedCount);
 	}
 #endif

tests/Directory.Build.props

@@ -2,6 +2,6 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
     <PackageReference Include="xunit" Version="2.5.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" />
   </ItemGroup>
 </Project>