Added assert/strict built-in

[piranna]

What kind of change does this PR introduce?

Did you add tests for your changes?

Does this PR introduce a breaking change?

What needs to be documented once your changes are merged?

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: piranna / name: Jesús Leganés-Combarro (cb02826)

[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)

[alexander-akait]

@TheLarkInn I think we can merge it, just small fix for Node env

[piranna]

@TheLarkInn I think we can merge it, just small fix for Node env

Thank you @alexander-akait, I don't know if there's any other built-in that we should add, I have just added this that's my personal case. I've seen that we are already currently checking for node: prefix, that's the recommended way, probably we should recommend it ourselves in the docs too.

[TheLarkInn]

Thank you for the PR 💟

[piranna]

You are welcome :-)