Update package.json

Author: mackysoft

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/package.json

@@ -1,8 +1,9 @@
 {
 	"name": "com.mackysoft.serializereference-extensions",
 	"displayName": "SerializeReference Extensions",
+	"author": { "name": "MackySoft", "url": "https://github.com/mackysoft" },
 	"version": "1.1.9",
-	"unity": "2019.4",
+	"unity": "2021.3",
 	"description": "Provide popup to specify the type of the field serialized by the [SerializeReference] attribute in the inspector.",
 	"keywords": [ "SerializeReference", "Editor" ],
 	"license": "MIT",