Nuget 5.0.0 built with wrong timestamps

[eitanhs]

Hi,

I had problem packing a project that uses Sigil 5.0.0, got an error: "The DateTimeOffset specified cannot be converted into a Zip file timestamp"

This is a known issue in Nuget that prevents packing files with no modification/creation timestamps.
After a little digging, I figured that Sigil 5.0.0 contains few files with incorrect timestamp,
After downgrading to previous version the problem solved.