Update 3 NuGet dependencies

Author: github-actions[bot]

System.IO.FileSystem/System.IO.FileSystem.nfproj

@@ -62,17 +62,20 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.12.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.12.0-preview.9\lib\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.12.0-preview.18\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.10.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.1.10.0-preview.8\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.1.10.0-preview.11\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <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.15\lib\nanoFramework.System.Text.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Text.1.1.3-preview.19\lib\nanoFramework.System.Text.dll</HintPath>
+      <Private>True</Private>
     </Reference>
     <Reference Include="System.IO.Streams, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.IO.Streams.1.0.0-preview.12\lib\System.IO.Streams.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.IO.Streams.1.0.0-preview.15\lib\System.IO.Streams.dll</HintPath>
+      <Private>True</Private>
     </Reference>
   </ItemGroup>
   <ProjectExtensions>

System.IO.FileSystem/packages.config

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <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.IO.Streams" version="1.0.0-preview.12" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Text" version="1.1.3-preview.15" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.18" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Runtime.Events" version="1.10.0-preview.11" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.IO.Streams" version="1.0.0-preview.15" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Text" version="1.1.3-preview.19" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.4.255" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>

nanoFramework.System.IO.FileSystem.nuspec

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
   <metadata>
     <id>nanoFramework.System.IO.FileSystem</id>
@@ -15,12 +15,13 @@
     <icon>images\nf-logo.png</icon>
     <repository type="git" url="https://github.com/nanoframework/System.IO.FileSystem" commit="$commit$" />
     <copyright>Copyright (c) .NET Foundation and Contributors</copyright>
-    <description>This package includes the System.IO.FileSystem assembly for .NET nanoFramework C# projects.&#10;This package requires a target with System.IO.FileSystem v$nativeVersion$ (checksum $checksum$).</description>
+    <description>This package includes the System.IO.FileSystem assembly for .NET nanoFramework C# projects.
+This package requires a target with System.IO.FileSystem v$nativeVersion$ (checksum $checksum$).</description>
     <tags>nanoFramework C# csharp netmf netnf System.IO.FileSystem</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.12.0-preview.9" />
-      <dependency id="nanoFramework.Runtime.Events" version="1.10.0-preview.8" />
-      <dependency id="nanoFramework.System.IO.Streams" version="1.0.0-preview.12" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.12.0-preview.18" />
+      <dependency id="nanoFramework.Runtime.Events" version="1.10.0-preview.11" />
+      <dependency id="nanoFramework.System.IO.Streams" version="1.0.0-preview.15" />
     </dependencies>
   </metadata>
   <files>