支持SSR、升级Vue版本和增加新的icon (#40)

* search component add new style

* update vue version and support ssr

* unit test

* add new icon

* new icon

test/unit/specs/badge.spec.js

@@ -21,7 +21,7 @@ describe('BadgeGroup', () => {
 
     const badge = wrapper.find('.van-badge')[0];
     const eventStub = sinon.stub(badge.vNode.child, '$emit');
-    badge.simulate('click');
+    badge.trigger('click');
 
     expect(eventStub.calledWith('click')).to.be.true;
   });