chore(package): update vue-template-compiler to version 2.6.6

Author: greenkeeper[bot]

package.json

@@ -51,7 +51,7 @@
     "stylelint-scss": "^3.4.4",
     "uglifyjs-webpack-plugin": "^2.1.1",
     "vue-loader": "^15.5.1",
-    "vue-template-compiler": "^2.5.21",
+    "vue-template-compiler": "^2.6.6",
     "webpackbar": "^3.1.4"
   },
   "dependencies": {