Apply npm shrinkwrap prior to release

[wooldridge]

npm shrinkwrap is a command line tool for npm that locks down the versions of a project’s dependencies. It lets you control exactly which versions of each dependency will be installed when a user runs npm install.

I researched shrinkwrap and presented to the API Team:

https://wiki.marklogic.com/display/~mwooldri/npm+shrinkwrap

The response from the team was positive. We've also implemented this in Samplestack.

Once our dependencies are locked down for this Node Client API release and the code is tested by QA, we will add npm-shrinkwrap.json file to lock down dependencies.

[wooldridge]

Related: #343

[wooldridge]

@ayuwono, I've added an npm-shrinkwrap.json file to local down dependencies based on current package.json (after #394 dependencies were added).

Please test. We can easily remove or regenerate this file (based on changed dependencies) if needed.

[ayuwono]

npm install and running test regression on test-complete are fine