Update 2 NuGet dependencies

Author: nfbot

nanoFramework.WebServer.nuspec

@@ -27,8 +27,8 @@ Supports both HTTPS and HTTP.</description>
       <dependency id="nanoFramework.System.Collections" version="1.3.0-preview.12" />
       <dependency id="nanoFramework.System.Text" version="1.1.2-preview.12" />
       <dependency id="nanoFramework.System.Net" version="1.7.1-preview.17" />
-      <dependency id="nanoFramework.System.Net.Http.Server" version="1.3.6-preview.12" />
-      <dependency id="nanoFramework.Windows.Storage" version="1.4.5-preview.16" />
+      <dependency id="nanoFramework.System.Net.Http.Server" version="1.3.6-preview.14" />
+      <dependency id="nanoFramework.Windows.Storage" version="1.4.5-preview.18" />
       <dependency id="nanoFramework.Windows.Storage.Streams" version="1.12.3-preview.10" />
     </dependencies>
   </metadata>

nanoFramework.WebServer/nanoFramework.WebServer.nfproj

@@ -65,11 +65,11 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="System.Net.Http, Version=1.3.6.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Net.Http.Server.1.3.6-preview.12\lib\System.Net.Http.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Net.Http.Server.1.3.6-preview.14\lib\System.Net.Http.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="Windows.Storage, Version=1.4.5.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Windows.Storage.1.4.5-preview.16\lib\Windows.Storage.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Windows.Storage.1.4.5-preview.18\lib\Windows.Storage.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="Windows.Storage.Streams, Version=1.12.3.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">

nanoFramework.WebServer/packages.config

@@ -4,9 +4,9 @@
   <package id="nanoFramework.Runtime.Events" version="1.9.2-preview.12" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Collections" version="1.3.0-preview.12" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Net" version="1.7.1-preview.17" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Net.Http.Server" version="1.3.6-preview.12" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Net.Http.Server" version="1.3.6-preview.14" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Text" version="1.1.2-preview.12" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Windows.Storage" version="1.4.5-preview.16" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Windows.Storage" version="1.4.5-preview.18" targetFramework="netnanoframework10" />
   <package id="nanoFramework.Windows.Storage.Streams" version="1.12.3-preview.10" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.4.205" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>