StartupJS Meta-package

This is a startupjs Meta-package which wraps all the main packages together
for easier distribution as a single package.

For the overall StartupJS readme refer to the root monorepos README.

Extra dependencies

- events is added here as an explicit dependency since it's used inside racer`.
Which does not list it in its own dependencies. Usually on the browser it will be polyfilled by
webpack, but in our case Metro does not polyfill it on it's own so we have to have it
present in our dependencies somewhere.