Release 3.0.0

[jonhue]

Breaking changes:

• Creating notifications for groups is now done through Notification.for_group instead of passing group as an argument to Notification.create. [Creating a notification using group, will return single notification #108] ([#108] Creating a notification using group, will return single notification #110)

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d17b629 [#116] Release workflow (#117)
dcd2746 Bump rubyzip in /notification-handler/spec/support/rails_app (#113)
ded4559 Bump nokogiri in /notification-handler/spec/support/rails_app (#114)
e0cf523 Bump nokogiri from 1.10.3 to 1.10.4 (#115)
cd59677 [#111] CI workflow (#112)
7c943b4 [#108] Creating a notification using group, will return single notification (#110)
622f16c [#107] notification-renderers type generator template not rendering example properly (#109)
cb94e40 [#105] Complete documentation of notification_target & notification_object (#106)