Failed to download repo vuejs-templates/webpack-simple: connect ETIMEDOUT 192.30.253.113:443
Failed to download repo vuejs-templates/webpack-simple: connect ETIMEDOUT 192.30.253.112:443，一直报这个错
解决步骤：
1.打开终端（cmd），输入命令：ping 192.30.253.112 发现连接超时；输入命令：ping github.com 显示超时。
2.打开 hosts文件，地址：C:\Windows\System32\drivers\etc 看是否是默认配置。默认配置如下：
# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host # localhost name resolution is handled within DNS itself.
# 127.0.0.1 localhost
# ::1 localhost
如果不是，还原成默认配置。
3.
看自己的ip地址（我的是联通的）：
4.在终端输入命令：ping github.com 如果还是超时，则打开http://ping.chinaz.com/https://github.com，搜索github的ip地址，
查询结果：
然后在hosts文件中添加：
192.30.253.112 github.com
151.101.88.249 github.global.ssl.fastly.net
在终端输入 ping github.com,如果通了，就可以了
4.然后就可以正常操作了