[history] Add extractor (Closes #4934)

youtube_dl/extractor/__init__.py

@@ -189,6 +189,7 @@ from .hellporno import HellPornoIE
 from .helsinki import HelsinkiIE
 from .hentaistigma import HentaiStigmaIE
 from .historicfilms import HistoricFilmsIE
+from .history import HistoryIE
 from .hitbox import HitboxIE, HitboxLiveIE
 from .hornbunny import HornBunnyIE
 from .hostingbulk import HostingBulkIE