Support for null-safety?

[alfredo-handcash]

Hi! First of all, thank you for your work and time creating this package, is amazing and help me a lot of times!!

There are any plan to migrate this package to null-safety? I think this is a package that another packages depends on, so there are a roadmap to be migrated?

Thank you!

[james-alex]

Hello, a pre-release null-safe version of date_time_format has been published to pub.dev.