Update nuget dependencies (#19)

Author: RobSlgm

WebPush.Test/WebPush.Test.csproj

@@ -8,8 +8,8 @@
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
         <PackageReference Include="Moq" Version="4.20.72" />
-        <PackageReference Include="MSTest.TestAdapter" Version="4.2.2" />
-        <PackageReference Include="MSTest.TestFramework" Version="4.2.2" />
+        <PackageReference Include="MSTest.TestAdapter" Version="4.2.3" />
+        <PackageReference Include="MSTest.TestFramework" Version="4.2.3" />
         <PackageReference Include="RichardSzalay.MockHttp" Version="7.0.0" />
     </ItemGroup>
     <ItemGroup>