Update 1 NuGet dependencies

Author: github-actions[bot]

nanoFramework.Networking.Sntp.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.Networking.Sntp</id>
@@ -20,7 +20,7 @@
 This package requires a target with nanoFramework.Networking.Sntp v$nativeVersion$ (checksum $checksum$).</description>
     <tags>nanoFramework C# csharp netmf netnf nanoFramework.Networking.Sntp sntp</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.11.7" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.12.0-preview.1" />
     </dependencies>
   </metadata>
   <files>

nanoFramework.Networking.Sntp/nanoFramework.Networking.Sntp.nfproj

@@ -48,8 +48,8 @@
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib, Version=1.11.7.2, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.11.7\lib\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=1.12.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.12.0-preview.1\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>

nanoFramework.Networking.Sntp/packages.config

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.11.7" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.1" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.3.37" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>