update restify types and fix tests

[mgebundy]

Description

Update the tests so that they pass. Travis check doesn't fail when tests are failing (this PR doesn't fix that).

Added a types folder, because the @types/restify package isn't up to date with restify 7.2. I'll be submitting a PR over there with the changes soon.

Related Issue

inversify/InversifyJS#886

Motivation and Context

Fixed the tests so they pass and we can have confidence in using the package with the newest versions of restify and inversify.

How Has This Been Tested?

npm test

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.