fix(types) preact/compat missing React.Key

Author: shyguy1412

compat/src/index.d.ts

@@ -153,6 +153,7 @@ declare namespace React {
 	export import ReactElement = preact1.VNode;
 	export import Consumer = preact1.Consumer;
 	export import ErrorInfo = preact1.ErrorInfo;
+	export import Key = preact1.Key;
 
 	// Suspense
 	export import Suspense = _Suspense.Suspense;