Update 1 NuGet dependencies

Author: github-actions[bot]

Tests/UnitTestDebugLogging/UnitTestDebugLogging.nfproj

@@ -52,7 +52,7 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Collections, Version=1.4.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.System.Collections.1.4.0-preview.16\lib\nanoFramework.System.Collections.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.System.Collections.1.4.0-preview.21\lib\nanoFramework.System.Collections.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=1.1.3.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">

Tests/UnitTestDebugLogging/packages.config

@@ -3,7 +3,7 @@
   <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.9" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Hardware.Esp32" version="1.3.5-preview.7" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Runtime.Events" version="1.10.0-preview.8" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Collections" version="1.4.0-preview.16" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Collections" version="1.4.0-preview.21" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.IO.FileSystem" version="1.0.3-preview.12" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.IO.Ports" version="1.0.3-preview.33" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.IO.Streams" version="1.0.0-preview.12" targetFramework="netnanoframework10" />

nanoFramework.Logging.Serial.nuspec

@@ -23,7 +23,7 @@ There is also a package with the Stream Logging only and another with the basic
       <dependency id="nanoFramework.Runtime.Events" version="1.10.0-preview.8" />
       <dependency id="nanoFramework.System.Text" version="1.1.3-preview.15" />
       <dependency id="nanoFramework.System.IO.Ports" version="1.0.3-preview.33" />
-      <dependency id="nanoFramework.System.Collections" version="1.4.0-preview.16" />
+      <dependency id="nanoFramework.System.Collections" version="1.4.0-preview.21" />
       <dependency id="nanoFramework.Logging" version="$version$" />
     </dependencies>
   </metadata>

nanoFramework.Logging.Serial/nanoFramework.Logging.Serial.nfproj

@@ -42,7 +42,7 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Collections, Version=1.4.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Collections.1.4.0-preview.16\lib\nanoFramework.System.Collections.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Collections.1.4.0-preview.21\lib\nanoFramework.System.Collections.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=1.1.3.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">

nanoFramework.Logging.Serial/packages.config

@@ -2,7 +2,7 @@
 <packages>
   <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.9" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Runtime.Events" version="1.10.0-preview.8" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Collections" version="1.4.0-preview.16" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Collections" version="1.4.0-preview.21" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.IO.Ports" version="1.0.3-preview.33" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.IO.Streams" version="1.0.0-preview.12" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Text" version="1.1.3-preview.15" targetFramework="netnanoframework10" />