API C QuestLog.GetAllCompletedQuestIDs

Returns all completed quests for the character.
 quests = C_QuestLog.GetAllCompletedQuestIDs()
==Returns==
:;quests: - The sorted quest IDs
==Details==
* A quest appears in the list only after it has been completed and turned in, not while it is in your log.
* Completing certain quests can cause other quests (alternate versions, etc.) to appear completed also.
* Some quests are invisible. These quests are not offered to players but suddenly become "completed" due to some other in-game occurrence.
* Daily quests and World quests appear completed only if they have been completed that day.
* Pet Battle quests are account-wide and will be returned from this API across all characters. They can be discerned with () tagID 102.
==Example==
For a fresh toon who only completed the first three starter quests: :Warming Up (56775), :Stand Your Ground (58209) and :Brace for Impact (58208)
 /dump C_QuestLog.GetAllCompletedQuestIDs()
{
	[1] = 56775, -- "Warming Up"
	[2] = 58208, -- "Brace for Impact"
	[3] = 58209, -- "Stand Your Ground"
}
Prints completed questIds and their names.
* Quest data might have to be cached first, from after the initial query or with QuestEventListener.
* Some quests returned from this don't seem to exist or have a name.
for _, id in pairs(C_QuestLog.GetAllCompletedQuestIDs()) do
	local name = C_QuestLog.GetTitleForQuestID(id)
	print(id, name)
end
==Patch changes==