fix(webpack): fix dev server unable to compile

[PixnBits]

node built-in modules not needed for d3-request dependency

admittedly I'm unable to run the tests yet as I'm unsure how to configure a chrome launcher on my pixelbook, hoping Travis is still building these

[PixnBits]

On the upside Travis is building PRs and webpack was able to build, but it looks like the saucelabs connectivity is broken

  Failed to start Sauce Connect:
  Could not start Sauce Connect. Exit code 1 signal: null

going to try out adding a change from karma-runner/karma-sauce-launcher#73 to this PR, which is a bit of scope creep but given this is the first PR in a while maybe the scope is less webpack and more PR builds \m/

[PixnBits]

Misconfigured -- Sauce Labs Authentication Error.
You used username 'None' and access key 'None' to authenticate, which are not valid Sauce Labs credentials.

Connecting, so that's progress. Going to also add username+password from env vars. Not sure if they're configured, so 🤞
I'd like to squash some of these commits before a merge 😛

[PixnBits]

Rats, looks like that was fruitless anyway as process.env.SAUCE_USERNAME is the default anyway.

[austinpray]

Hey friend! Thanks for the PRs! I apologize for not following up: you caught me on vacation. I’m back tomorrow though and can review.