Update README.md

Author: tingyuan

README.md

@@ -1,5 +1,5 @@
 # vue-flags-webpack-plugin
-Remove useless code by setting flags(toggles) in .vue SFC file(works with [`vue-loader`](https://github.com/vuejs/vue-loader) >= 15 and `webpack` >= 4)
+Remove useless code by setting flags(toggles) in .vue SFC file
 
 [![npm version](https://img.shields.io/npm/v/vue-flags-webpack-plugin.svg)](https://www.npmjs.com/package/vue-flags-webpack-plugin)
 [![Build Status](https://travis-ci.org/lovetingyuan/vue-flags-webpack-plugin.svg?branch=master)](https://travis-ci.org/lovetingyuan/vue-flags-webpack-plugin)
@@ -143,6 +143,7 @@ vue component:
 ```
 
 ### ⚠️ Caveats
+* requires [`vue-loader`](https://github.com/vuejs/vue-loader) >= 15, `webpack` >= 4, `vue-template-compiler` >= 2.5.12
 * `v-*-flag` can not be used with `v-if` followed by `v-else-if` or `v-else`.
 
   💡use `<template v-*-flag>` to wrap the condition elements.