Correct webpack name casing

[lewislbr]

webpack should always be written in lower-case, according to webpack's branding guidelines, so I've corrected all incorrect instances, excluding bundle files.

[andriijas]

Nice find. Sorry for the "but" but, in https://webpack.js.org/configuration/dev-server/ they name WebpackDevServer with capital W in multiple places.

[lewislbr]

True! Will correct it.

[andriijas]

@lewislbr what happened?

[lewislbr]

@andriijas Honestly, not sure. I cloned my remote branch thinking I had no local branch, but I had, pushed to it, both branches merged and the PR closed itself 😓. I will open a new PR with a clean commit.