Update dependency webpack-cli to v3.3.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
webpack-cli	devDependencies	patch	3.3.3 -> 3.3.4

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Release Notes

webpack/webpack-cli

v3.3.4

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Full Changelog

New Features

• add workbox + offline support (589253e)
• better defaults (77bf564)

Chore

• fix prompt (478340d)
• improved err msg (23eddcb)
• removed the commented statement (bf0efa5)
• remove unused dep (7dd8ff2)
• fix sec vuln (545ef3a)
• fix sec vuln (4760125)
• readd docs (830eaf3)
• reset prompting for cmd (a16f8dc)
• remove unused file (a0a06b3)

Docs

• added auto flag in docs for init command (dede7d8)

Fix

• module not found error (a2062f2)
• remove unused pkgs and refactor init generator (7608d4b)

Tests

• fix failing ones (d154d0e)

Misc

• finetune 0cjs (bd2cd86)
• improve cjs (60ecc02)

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