feat: add <Animation> component

package.json

@@ -1,6 +1,6 @@
 {
   "name": "libreact",
-  "version": "0.7.1",
+  "version": "0.8.1",
   "description": "React standard library",
   "main": "lib/index.js",
   "repository": {

src/Animation/index.ts

@@ -0,0 +1,29 @@
+import {render, createEnhancer} from 'react-universal-interface';
+import {Tween, ITweenProps} from '../Tween';
+import {h} from '../util';
+
+export interface IAnimationProps extends ITweenProps {
+  map: {[key: string]: [number, number]};
+}
+
+export const Animation: React.SFC<IAnimationProps> = (props) => {
+  return h(Tween, props,
+    ({value}) => {
+      const {map} = props;
+      const keys = Object.keys(map);
+      const interpolated = {};
+
+      for (let i = 0; i < keys.length; i++) {
+        const key = keys[i];
+        const [start, end] = map[key];
+        const diff = end - start;
+
+        interpolated[key] = diff * value + start;
+      }
+
+      render(props, interpolated);
+    }
+  );
+};
+
+export const withAnimation = createEnhancer(Animation, 'animation');