some fixes

src/Node.ts

@@ -2544,7 +2544,7 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
   skewX: GetSet<number, this>;
   skewY: GetSet<number, this>;
 
-  to: (params: animOptions) => void;
+  to: (params: AnimTo) => void;
 
   transformsEnabled: GetSet<string, this>;
 
@@ -2611,20 +2611,10 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
   }
 }
 
-interface animOptions {
-  x?: number
-  y?: number;
-  height?: number;
-  width?: number;
-  skewX?: number;
-  skewY?: number;
-  scaleY?: number;
-  scaleX?: number;
-  rotation?: number;
-  opacity?: number;
-  offsetY?: number;
-  offsetX?: number;
-  brightness?: number;
+interface AnimTo extends NodeConfig {
+  onFinish?: Function;
+  onUpdate?: Function;
+  duration?: number;
 }
 
 Node.prototype.nodeType = 'Node';

src/Tween.ts

@@ -1,6 +1,6 @@
 import { Util } from './Util';
 import { Animation } from './Animation';
-import { Node } from './Node';
+import { Node, NodeConfig } from './Node';
 import { Konva } from './Global';
 import { Line } from './shapes/Line';
 
@@ -149,6 +149,13 @@ class TweenEngine {
   }
 }
 
+export interface TweenConfig extends NodeConfig {
+  onFinish?: Function;
+  onUpdate?: Function;
+  duration?: number;
+  node: Node;
+}
+
 /**
  * Tween constructor.  Tweens enable you to animate a node between the current state and a new state.
  *  You can play, pause, reverse, seek, reset, and finish tweens.  By default, tweens are animated using
@@ -187,7 +194,7 @@ export class Tween {
   onReset: Function;
   onUpdate: Function;
 
-  constructor(config) {
+  constructor(config: TweenConfig) {
     var that = this,
       node = config.node,
       nodeId = node._id,

src/index-types.d.ts

@@ -93,6 +93,7 @@ declare namespace Konva {
 
   export const Tween: typeof import('./Tween').Tween;
   export type Tween = import('./Tween').Tween;
+  export type TweenConfig = import('./Tween').TweenConfig;
   export const Easings: typeof import('./Tween').Easings;
 
   export const Arc: typeof import('./shapes/Arc').Arc;