Update dependency webpack to v4.30.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
webpack	devDependencies	minor	4.29.6 -> 4.30.0	source

---

Release Notes

webpack/webpack

### [`v4.30.0`](https://togithub.com/webpack/webpack/releases/v4.30.0) [Compare Source](https://togithub.com/webpack/webpack/compare/v4.29.6...v4.30.0) ### Features - add `amd: false` to disable AMD support - `Compilation.hooks.finishModules` now also allows async plugins - add `output.libraryTarget: "system"` to compile for SystemJs environment ### Bugfixes - fix generating a `null` id when concatenating an entry module in a different chunk - fix unneeded chunk references when splitting modules from chunks - fix parsing of function name in function scope ### Performance - Lazy require some internal files - Faster way to generate function headers ### Contributing - Run prettier on examples markdown

---

Renovate configuration

:date: Schedule: At any time (no schedule defined).

:vertical_traffic_light: Automerge: Disabled by config. Please merge this manually once you are satisfied.

:recycle: Rebasing: Whenever PR becomes conflicted, or if you modify the PR title to begin with "rebase!".

:no_bell: Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Renovate Bot. View repository job log here.