Update dependencies (#23)

Author: RobSlgm

WebPush.Test/WebPush.Test.csproj

@@ -6,11 +6,11 @@
         <IsTestProject>true</IsTestProject>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
         <PackageReference Include="Moq" Version="4.20.72" />
-        <PackageReference Include="MSTest.TestAdapter" Version="4.3.2" />
-        <PackageReference Include="MSTest.TestFramework" Version="4.3.2" />
-        <PackageReference Include="RichardSzalay.MockHttp" Version="7.0.0" />
+        <PackageReference Include="MSTest.TestAdapter" Version="4.3.3" />
+        <PackageReference Include="MSTest.TestFramework" Version="4.3.3" />
+        <PackageReference Include="RichardSzalay.MockHttp" Version="7.1.0" />
     </ItemGroup>
     <ItemGroup>
         <ProjectReference Include="..\WebPush\WebPush.csproj" />