Reject Joker, embrace Nao

Fixes

• [Exiled.API] Fixed Hazard::Get(EnvironmentalHazard) throwing an ArgumentException when adding a new key.
• [Exiled.API] Fixed NullReferenceException being thrown during loading.
• [Exiled.API] Fixed MirrorExtensions::ResyncSyncVar not behaving as expected.

Additions

• Added [Exiled.API] CommonExtensions::GetRandomValue(IEnumerable<T>) to get a random item given a IEnumerable<T>.

Changes (Breaking)

• None

Changes (Non-Breaking)

• None