Switch ICSharpCode.SharpZipLib to NuGet

Author: Sharpe49

Source/3rdPartyLibs/ICSharpCode.SharpZipLib.dll

@@ -12,10 +12,6 @@
     <DocumentationFile>..\..\Program\Orts.Parsers.Msts.xml</DocumentationFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="ICSharpCode.SharpZipLib, Version=0.81.0.1407, Culture=neutral, PublicKeyToken=1b03e6acf1164f73">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\3rdPartyLibs\ICSharpCode.SharpZipLib.dll</HintPath>
-    </Reference>
     <Reference Include="MonoGame.Framework">
       <HintPath>$(SolutionDir)\3rdPartyLibs\MonoGame\MonoGame.Framework.dll</HintPath>
     </Reference>
@@ -24,5 +20,6 @@
     <PackageReference Include="Microsoft.DotNet.UpgradeAssistant.Extensions.Default.Analyzers" Version="0.4.336902">
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
+    <PackageReference Include="SharpZipLib" Version="1.3.3" />
   </ItemGroup>
 </Project>