An in-range update of webpack-dev-server is breaking the build 🚨 about react

[greenkeeper]

• The devDependency webpack-dev-server was updated from 3.3.0 to 3.3.1.

Your tests are still failing with this version. Compare changes

Release Notes for v3.3.1

3.3.1 (2019-04-09)

Bug Fixes

• regression: always get necessary stats for hmr (#1780) (66b04a9)
• regression: host and port can be undefined or null (#1779) (028ceee)
• only add entries after compilers have been created (#1774) (b31cbaa)

Commits

The new version differs by 6 commits.

• 99b78dc chore(release): 3.3.1
• f10fd68 docs: fix changelog (#1783)
• b31cbaa fix: only add entries after compilers have been created (#1774)
• 66b04a9 fix(regression): always get necessary stats for hmr (#1780)
• 028ceee fix(regression): host and port can be undefined or null (#1779)
• f5ea174 docs(contribution): alternative way to test (#1506)

See the full diff