[deliver] set type of auto release date to integer

[joshdholtz]

Motivation and Context

Fixes #16640 (comment)

Description

Fixes issue like 👇

upload_metadata.rb:327:in convert_ms_to_iso8601': undefined method /' for "1596146400000":String

[myanime]

looks good 👍 I spent nearly half a day trying to figure this out ;).
EDIT: Was just thinking about this, maybe it might be a good idea to somehow validate if this Integer is at least 13 numbers long, ie milliseconds. Its pretty easy to make a mistake and put seconds in here. Not for this PR obviously, but maybe something to think about down the line.

[joshdholtz]

@myanime I like that validation actually 🤔 I will add it to this PR now 😊

[joshdholtz]

@myanime 👋 I updated this with a validation to make sure auto_release_date is greater than Time.now.to_i * 1000. This should make sure its in ms and in the future.

[fastlane-bot]

Hey @joshdholtz 👋

Thank you for your contribution to fastlane and congrats on getting this pull request merged 🎉
The code change now lives in the master branch, however it wasn't released to RubyGems yet.
We usually ship about once a week, and your PR will be included in the next one.

Please let us know if this change requires an immediate release by adding a comment here 👍
We'll notify you once we shipped a new release with your changes 🚀

[fastlane-bot]

Congratulations! 🎉 This was released as part of fastlane 2.151.0 🚀