Upgrade System.Memory to v4.5.4

Author: mythz

src/ServiceStack.Text/ServiceStack.Text.Core.csproj

@@ -16,7 +16,7 @@
     <DefineConstants>$(DefineConstants);NETSTANDARD;NETCORE2_1</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="System.Memory" Version="4.5.3" />
+    <PackageReference Include="System.Memory" Version="4.5.4" />
     <PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">

src/ServiceStack.Text/ServiceStack.Text.csproj

@@ -15,7 +15,7 @@
     <DefineConstants>$(DefineConstants);NETSTANDARD;NETCORE2_1</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="System.Memory" Version="4.5.3" />
+    <PackageReference Include="System.Memory" Version="4.5.4" />
     <PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">

tests/ServiceStack.Text.Tests/ServiceStack.Text.Tests.csproj

@@ -33,7 +33,7 @@
     <PackageReference Include="System.Runtime" Version="4.3.1" />
     <PackageReference Include="System.Runtime.Serialization.Json" Version="4.3.0" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
-    <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)' == 'net45' ">

tests/ServiceStack.Text.TestsConsole/ServiceStack.Text.TestsConsole.csproj

@@ -18,7 +18,7 @@
     <ProjectReference Include="..\..\src\ServiceStack.Text\ServiceStack.Text.csproj" />
     <ProjectReference Include="..\ServiceStack.Text.Tests\ServiceStack.Text.Tests.csproj" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
-    <PackageReference Include="System.Memory" Version="4.5.3" />
+    <PackageReference Include="System.Memory" Version="4.5.4" />
     <PackageReference Include="ServiceStack" Version="$(Version)" />
     <Reference Include="System" />
     <Reference Include="System.Core" />