Properly update event handler and value in array event listeners

modules/eventlisteners.js

@@ -16,6 +16,7 @@ function updateEventListeners(oldVnode, vnode) {
     } else if (is.array(old)) {
       old[0] = cur[0]; // Deliberately modify old array since it's
       old[1] = cur[1]; // captured in closure created with `arrInvoker`
+      on[name]  = old;
     }
   }
 }

test/core.js

@@ -424,11 +424,16 @@ describe('snabbdom', function() {
       var vnode2 = h('div', {on: {click: [clicked, 2]}}, [
         h('a', 'Click my parent'),
       ]);
+      var vnode3 = h('div', {on: {click: [clicked, 3]}}, [
+        h('a', 'Click my parent'),
+      ]);
       patch(vnode0, vnode1);
       elm.click();
       patch(vnode1, vnode2);
       elm.click();
-      assert.deepEqual(result, [1, 2]);
+      patch(vnode2, vnode3);
+      elm.click();
+      assert.deepEqual(result, [1, 2, 3]);
     });
   });
   describe('hooks', function() {