Support more of the SciMLBase events API #17

Job	Run time
Tests (Downstream) / Tests - Downstream	7m 56s
Tests (Extensions) / Tests - Extensions	6m 4s
Tests (InterfaceI) / Tests - InterfaceI	29m 25s
Tests (InterfaceII) / Tests - InterfaceII	7m 18s
Tests (RegressionI) / Tests - RegressionI	7m 35s
	58m 18s

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