Update ServiceStack.Redis.Tests.csproj

Author: mythz

tests/ServiceStack.Redis.Tests/ServiceStack.Redis.Tests.csproj

@@ -19,7 +19,7 @@
     <PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.8.0" />
     <PackageReference Include="NUnit" Version="3.10.1" />
-    <PackageReference Include="System.Memory" Version="4.5.3" />
+    <PackageReference Include="System.Memory" Version="4.5.4" />
     <PackageReference Include="ServiceStack" Version="$(Version)" />
   </ItemGroup>
   <PropertyGroup Condition=" '$(TargetFramework)' == 'net46' ">