Adds supports for WikibaseDataModel 5 and 6

Author: Tpt

composer.json

@@ -16,7 +16,7 @@
 	],
 	"require": {
 		"php": ">=5.5.0",
-		"wikibase/data-model": "~4.3",
+		"wikibase/data-model": "~4.3|~5.0|~6.0",
 		"wikibase/data-model-services": "~3.2",
 		"wikibase/data-model-serialization": "~2.0",
 		"data-values/data-values": "~1.0",