Fix bug regarding changed text nodes

package.json

@@ -1,6 +1,6 @@
 {
   "name": "snabbdom",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "A virtual DOM library with focus on simplicity, modularity, powerful features and performance.",
   "main": "snabbdom.js",
   "directories": {

snabbdom.js

@@ -193,7 +193,7 @@ function init(modules) {
         removeVnodes(elm, oldCh, 0, oldCh.length - 1);
       }
     } else if (oldVnode.text !== vnode.text) {
-      elm.childNodes[0].nodeValue = vnode.text;
+      elm.textContent = vnode.text;
     }
     return vnode;
   }

test/core.js

@@ -360,6 +360,14 @@ describe('snabbdom', function() {
         patch(vnode1, vnode2);
         assert.equal(elm.childNodes[0].textContent, 'Text');
       });
+      it('handles changing text children', function() {
+        var vnode1 = h('div', ['Text', h('span', 'Span')]);
+        var vnode2 = h('div', ['Text2', h('span', 'Span')]);
+        patch(vnode0, vnode1);
+        assert.equal(elm.childNodes[0].textContent, 'Text');
+        patch(vnode1, vnode2);
+        assert.equal(elm.childNodes[0].textContent, 'Text2');
+      });
       it('prepends element', function() {
         var vnode1 = h('div', [h('span', 'World')]);
         var vnode2 = h('div', [h('span', 'Hello'), h('span', 'World')]);