chore(types): improve typing of emitted (#1640)

Author: xanf

src/vueWrapper.ts

@@ -172,7 +172,7 @@ export class VueWrapper<
   }
 
   emitted<T = unknown>(): Record<string, T[]>
-  emitted<T = unknown>(eventName: string): undefined | T[]
+  emitted<T = unknown[]>(eventName: string): undefined | T[]
   emitted<T = unknown>(
     eventName?: string
   ): undefined | T[] | Record<string, T[]> {

test-dts/wrapper.d-test.ts

@@ -62,6 +62,11 @@ byClassArray = domWrapper.findAll('.todo')
 expectType<Element | undefined>(byClassArray[0].element)
 
 // emitted
+
+// event name without specific type
+let incrementEventWithoutType = wrapper.emitted('increment')
+expectType<unknown[][] | undefined>(incrementEventWithoutType)
+
 // event name
 let incrementEvent = wrapper.emitted<{ count: number }>('increment')
 expectType<{ count: number }[] | undefined>(incrementEvent)