invalid top level package.json file and pre-release/beta release request

[coderjonny]

Description

Hello, thanks for this awesome e2e testing library for React Native!
I'm trying to using the latest greatest commit on Detox#master but Yarn/npm won't allow it.
The top level package.json is invalid, so I've made pull request to address it:
#500

I would love to use the latest features and would it would help out greatly especially the android update.

Would you guys be open to do pre-releases or beta releases in the future?

Steps to Reproduce

yarn add https://github.com/wix/detox.git#master -D
will error out because the top level package.json is invalid

The top level package.json is not valid.
http://package-json-validator.com/

Detox, Node, Device, Xcode and macOS Versions

• Detox: detox@6.0.4
• Node: v8.9.3
• Yarn: 1.3.2

[LeoNatan]

As discussed in the PR, closing this issue.