Merge pull request doorkeeper-gem#671 from emeryamiller/master

Use Time instead of DateTime

Release version 3.0.0.rc1

Update NEWS.md.

[ci skip]

Release version 2.2.1

Update NEWS.md.

[ci skip]

Release version 2.1.4

[ci skip]

Release version 1.4.2

CHANGELOG update.

[ci skip]

Release version 2.1.3

CHANGELOG update.

[ci skip]

Release version 2.1.2

CHANGELOG update.

[ci skip]

Release version 2.1.1

CHANGELOG update.

[ci skip]

Release version 2.1.0

I yanked version 2.0.2, this was a minor release, not a patch release.

[ci skip]