chore: merge branch 'docs' into dev [ci skip]

Author: haoqunjiang

docs/config/README.md

@@ -101,7 +101,7 @@ module.exports = {
 
   Build the app in multi-page mode. Each "page" should have a corresponding JavaScript entry file. The value should be an object where the key is the name of the entry, and the value is either:
 
-  - An object that specifies its `entry`, `template`, `filename`, `title` and `chunks` (all optional except `entry`);
+  - An object that specifies its `entry`, `template`, `filename`, `title` and `chunks` (all optional except `entry`). Any other properties added beside those will also be passed directly to `html-webpack-plugin`, allowing user to customize said plugin;
   - Or a string specifying its `entry`.
 
   ``` js

docs/guide/deployment.md

@@ -143,13 +143,13 @@ Create a new Firebase project on your [Firebase console](https://console.firebas
 
 Make sure you have installed [firebase-tools](https://github.com/firebase/firebase-tools) globally:
 
-```
+```bash
 npm install -g firebase-tools
 ```
 
 From the root of your project, initialize `firebase` using the command:
 
-```
+```bash
 firebase init
 ```
 
@@ -190,7 +190,7 @@ Run `npm run build` to build your project.
 
 To deploy your project on Firebase Hosting, run the command:
 
-```
+```bash
 firebase deploy --only hosting
 ```
 
@@ -202,7 +202,11 @@ Please refer to the [Firebase Documentation](https://firebase.google.com/docs/ho
 
 ### Now
 
-1. Install the Now CLI globally: `npm install -g now`
+1. Install the Now CLI globally:
+
+```bash
+npm install -g now
+```
 
 2. Add a `now.json` file to your project root:
 
@@ -256,7 +260,7 @@ To deploy with [Surge](http://surge.sh/) the steps are very straightforward.
 
 First you would need to build your project by running `npm run build`. And if you haven't installed Surge's command line tool, you can simply do so by running the command:
 
-```
+```bash
 npm install --global surge
 ```
 

docs/zh/dev-guide/plugin-dev.md

@@ -300,7 +300,7 @@ module.exports = api => {
 
 #### 第三方插件的对话
 
-第三方插件通常会在一个项目创建完毕后被手动安装，且用户将会通过调用 `vue invoke` 来初始化这个插件。如果这个插件在其根目录包含一个 `prompt.js`，那么它将会用在该插件被初始化调用的时候。这个文件应该导出一个用于 Inquirer.js 的[问题](https://github.com/SBoudrias/Inquirer.js#question)的数组。这些被解析的答案对象会作为选项被传递给插件的 generator。
+第三方插件通常会在一个项目创建完毕后被手动安装，且用户将会通过调用 `vue invoke` 来初始化这个插件。如果这个插件在其根目录包含一个 `prompts.js`，那么它将会用在该插件被初始化调用的时候。这个文件应该导出一个用于 Inquirer.js 的[问题](https://github.com/SBoudrias/Inquirer.js#question)的数组。这些被解析的答案对象会作为选项被传递给插件的 generator。
 
 或者，用户可以通过在命令行传递选项来跳过对话直接初始化插件，比如：