添加 ok(key, value) fail(key, value)，兼容老版本

src/main/java/com/jfinal/kit/Ret.java

@@ -122,6 +122,10 @@ public class Ret extends HashMap {
 		return new Ret().setOk()._setMsg(msg);
 	}
 	
+	public static Ret ok(Object key, Object value) {
+		return new Ret().setOk().set(key, value);
+	}
+	
 	public static Ret fail() {
 		return new Ret().setFail();
 	}
@@ -130,6 +134,11 @@ public class Ret extends HashMap {
 		return new Ret().setFail()._setMsg(msg);
 	}
 	
+	@Deprecated
+	public static Ret fail(Object key, Object value) {
+		return new Ret().setFail().set(key, value);
+	}
+	
 	public static Ret state(Object value) {
 		return new Ret()._setState(value);
 	}