refactor build

.babelrc

@@ -1,7 +1,12 @@
 {
   "presets": [
-    ["env", { "modules": false }],
+    ["env", {
+      "modules": false,
+      "targets": {
+        "browsers": ["> 1%", "last 2 versions", "not ie <= 8"]
+      }
+    }],
     "stage-2"
   ],
-  "plugins": ["transform-runtime"]
+  "plugins": ["transform-vue-jsx", "transform-runtime"]
 }