Bug in webpack-cli breaking

[rmarren1]

I'm getting this known bug: webpack/webpack-cli#607

E.g., in the CI here: https://circleci.com/gh/plotly/dash-html-components/328?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link

I think we just need to bump webpack-cli, I'll see if that works.

[rmarren1]

rmarren1@75d441d

This fixed it.

[rmarren1]

Turns out this is happening outside of this PR as well