Push Latest Version to NPM

[trademark18]

It looks like the version that is published to NPM is 4fb4aea which is missing a couple of fixes from the latest commits (I specifically needed fixes from #8)

For now I've installed directly from the repo, but it's pretty hard to use from NPM as it stands.

To install from the repo (until latest is available through NPM)

sudo npm -g i https://github.com/orchestrated-io/artillery-engine-lambda