upgrade tooling for improved array types

[sokra]

fixes #11801
fixes #11850

What kind of change does this PR introduce?
deps, bugfix

Did you add tests for your changes?
no

Does this PR introduce a breaking change?
no

What needs to be documented once your changes are merged?
nothing

[webpack-bot]

For maintainers only:

• This needs to be documented (issue in webpack/webpack.js.org will be filed when merged)
• This needs to be backported to webpack 4 (issue will be created when merged)