Update 2 NuGet dependencies

Author: github-actions[bot]

Tests/NetworkHelperTests/NetworkHelperTests.nfproj

@@ -53,7 +53,7 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="System.Threading, Version=1.0.4.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.System.Threading.1.0.4-preview.6\lib\System.Threading.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.System.Threading.1.0.4-preview.8\lib\System.Threading.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>

Tests/NetworkHelperTests/packages.config

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.1" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Threading" version="1.0.4-preview.6" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Threading" version="1.0.4-preview.8" targetFramework="netnanoframework10" />
   <package id="nanoFramework.TestFramework" version="1.0.172" targetFramework="netnanoframework10" developmentDependency="true" />
 </packages>

nanoFramework.System.Net.nuspec

@@ -22,8 +22,8 @@ This package requires a target with System.Net v$nativeVersion$ (checksum $check
     <dependencies>
       <dependency id="nanoFramework.CoreLibrary" version="1.12.0-preview.1" />
       <dependency id="nanoFramework.Runtime.Events" version="1.10.0-preview.4" />
-      <dependency id="nanoFramework.System.Text" version="1.1.3-preview.4" />
-      <dependency id="nanoFramework.System.Threading" version="1.0.4-preview.6" />
+      <dependency id="nanoFramework.System.Text" version="1.1.3-preview.7" />
+      <dependency id="nanoFramework.System.Threading" version="1.0.4-preview.8" />
     </dependencies>
   </metadata>
   <files>

nanoFramework.System.Net/System.Net.nfproj

@@ -139,12 +139,11 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=1.1.3.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Text.1.1.3-preview.4\lib\nanoFramework.System.Text.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Text.1.1.3-preview.7\lib\nanoFramework.System.Text.dll</HintPath>
       <Private>True</Private>
-      <SpecificVersion>True</SpecificVersion>
     </Reference>
     <Reference Include="System.Threading, Version=1.0.4.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Threading.1.0.4-preview.6\lib\System.Threading.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Threading.1.0.4-preview.8\lib\System.Threading.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>

nanoFramework.System.Net/packages.config

@@ -2,7 +2,7 @@
 <packages>
   <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.1" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Runtime.Events" version="1.10.0-preview.4" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Text" version="1.1.3-preview.4" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Threading" version="1.0.4-preview.6" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Text" version="1.1.3-preview.7" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Threading" version="1.0.4-preview.8" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.1.91" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>