[Bug]: Crash on MSI file with long strings

[Exorcism0666]

Is there an existing issue for this?

• I have searched the existing issues

What happened?

[Exorcism0666]

[russellbanks]

I've reported this in mdsteele/rust-msi#22

[aaronliu0130]

Also possible when creating a new package:

> 1st Installer URL https://piston.feed-the-beast.com/app/ftb-app-1.25.8-x64.exe
> 2nd Installer URL https://download.overwolf.com/installer/-1/website3/cmogmmciplgmocnhikmphehmeecmpaggknkjlbag/FTB%20
ppInstaller.exe
? 3rd Installer URL <canceled>
> Custom installer switch:
The application panicked (crashed).
Message:  called `Option::unwrap()` on a `None` value
Location: src\commands\new_version.rs:254