Fixed a package install failure at npm install

[m0ai]

What is this merge requests?

This merge requests created for solve a travis-ci error during npm install; related to the same issuse

/var/www/html/client/node_modules/webpack-cli/bin/config-yargs.js:89
				describe: optionsSchema.definitions.output.properties.path.description,
				                                           ^
TypeError: Cannot read property 'properties' of undefined

What is changed?

• Changed a webpack-cli version; ^2.1.5 to ^3.1.1
• Changed a webpack-dev-server(dependecy of webpack-cli); ^3.1.10 to ^3.1.14

[m0ai]

duplicate with #50