Update 1 NuGet dependencies

Author: github-actions[bot]

Tests/System.Threading.CancellationToken/System.Threading.CancellationToken.nfproj

@@ -32,7 +32,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.12.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.12.0-preview.18\lib\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.12.0-preview.19\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.TestFramework, Version=1.0.181.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">

Tests/System.Threading.CancellationToken/packages.config

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.18" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.19" targetFramework="netnanoframework10" />
   <package id="nanoFramework.TestFramework" version="1.0.181" targetFramework="netnanoframework10" developmentDependency="true" />
 </packages>

nanoFramework.System.Threading.nuspec

@@ -18,7 +18,7 @@
     <description>This package includes the nanoFramework.System.Threading assembly for .NET nanoFramework C# projects.</description>
     <tags>nanoFramework C# csharp netmf netnf </tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.12.0-preview.18" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.12.0-preview.19" />
     </dependencies>
   </metadata>
   <files>

nanoFramework.System.Threading/nanoFramework.System.Threading.nfproj

@@ -63,7 +63,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.12.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.12.0-preview.18\lib\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.12.0-preview.19\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>

nanoFramework.System.Threading/packages.config

@@ -3,6 +3,6 @@
   <package id="Microsoft.Build.Tasks.Git" version="1.0.0" targetFramework="netnanoframework10" developmentDependency="true" />
   <package id="Microsoft.SourceLink.Common" version="1.0.0" targetFramework="netnanoframework10" developmentDependency="true" />
   <package id="Microsoft.SourceLink.GitHub" version="1.0.0" targetFramework="netnanoframework10" developmentDependency="true" />
-  <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.18" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.19" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.3.37" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>