Bump LibZipSharp to 3.1.1 (#228)

Author: dellis1972

src/Microsoft.Android.Build.BaseTasks/MSBuildReferences.projitems

@@ -6,7 +6,7 @@
   <PropertyGroup>
     <MSBuildPackageReferenceVersion Condition=" '$(MSBuildPackageReferenceVersion)' == '' ">17.8.3</MSBuildPackageReferenceVersion>
     <SystemSecurityCryptographyXmlVersion Condition=" '$(SystemSecurityCryptographyXmlVersion)' == '' ">7.0.1</SystemSecurityCryptographyXmlVersion>
-    <LibZipSharpVersion Condition=" '$(LibZipSharpVersion)' == '' " >3.0.0</LibZipSharpVersion>
+    <LibZipSharpVersion Condition=" '$(LibZipSharpVersion)' == '' " >3.1.1</LibZipSharpVersion>
     <MonoUnixVersion>7.1.0-final.1.21458.1</MonoUnixVersion>
   </PropertyGroup>