Bump LibZipSharp to 3.1.1 (#228)

Author: dellis1972

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

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