v9.0.0-rc.2

Additions

• Add postDistributedNotifications matcher for testing DistributedNotificationCenter #786 (Thanks @fabianmuecke)
• Rename postNotifications(_:fromNotificationCenter:) to postNotifications(_:from:) #788

Improvements

• Remove unused ExpectationMessage.sampleMessage #654
• Refactor beEmpty matcher and add tests #785
• Refactor postNotifications matchers #787
• Create dependabot.yml #804
• Bump cocoapods from 1.9.2 to 1.9.3 #805

Bugfixes

• Disambiguate postNotifications overloads #794
• Switch back to use +[NSObject load] for registering CurrentTestCaseTracker #815