Pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
webpack	devDependencies	pin	^4.44.1 -> 4.44.1
webpack-cli	devDependencies	pin	^3.3.12 -> 3.3.12
webpack-dev-server	devDependencies	pin	^3.11.0 -> 3.11.0

📌 Important: Renovate will wait until you have merged this Pin PR before creating any upgrade PRs for the affected packages. Add the preset :preserveSemverRanges to your config if you instead don't wish to pin dependencies.

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