Use custom Whoops CSS even when using custom vendor path
allow passing datetime objects to queue later.
update change log.
Merge pull request #2220 from adamwathan/whoops-css

Use custom Whoops CSS even when using custom vendor path
fix possible bug in session keep.
Merge remote-tracking branch 'origin/4.0' into 4.0
Added Queue::bulk method.
cast to array just in case we dont know beforehand.
allow date array on eloquent objects for quick setting of dates.
update change log.
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remove unused code in provider repository.
remove extra line space.
Increment version.
Get queue name for pushed jobs from the Iron-Subscriber-Message-Url header
Combine Iron queue `push` & `later` methods
Inject attempt count into iron message payload
Create new iron job on release, and return attempt from payload