Small webpack-cli version bug fix

Hey Webpackers!

A tiny release that addresses a possible dependency issue with webpack-cli that can cause aa cryptic error. No fun!

To upgrade run:

yarn upgrade "@symfony/webpack-encore@^1.7.1"

Changes: v1.7.0..v1.7.1

Documentation: http://symfony.com/doc/current/frontend.html

Highlights:

Bug Fix

• #1069 - Increased webpack-cli version constraint to v.4.9.1 - @nspyke

Happy packing!