Upgrades three dependency to ^0.84.0

[Syynth]

At some point between 0.74 and 0.84, the three package became an actual ES Module, with an __esModule: true flag. This caused the webpack process for the build-commonjs process to generate bad code. The simplest solution seemed like just changing the import statements to require statements.

[Izzimach]

Thanks for adding that, but this was already fixed in the dev branch as 64206317d96b42f935b29fee076a84e85053a07b

I'll try to publish a new npm this week.