Update minor devDeps

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
postcss (source)	devDependencies	patch	8.0.5 -> 8.0.6
webpack	devDependencies	patch	4.44.1 -> 4.44.2

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Release Notes

postcss/postcss

v8.0.6

Compare Source

• Fixed child adding methods in Container.

webpack/webpack

v4.44.2

Compare Source

Bugfixes

• make sure to generate correct chunk connection for blocks that are only connected in some runtimes
  • fixes a bug where filename contains undefined hash at runtime

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