Updating `package.json` to account for meddleware version update (2.0.0)

Updating `package.json` to account for meddleware version update (now at 2.0.0)
- krakenjs/meddlware is now at version 2.0.0:
  https://github.com/krakenjs/meddleware/commit/01c2c8fbeade81eac8ea295ae30c5bcc1ed2d446
- One change that this version includes is the ability to always disable middleware from the config (via `"enabled": false`). Prior to this version, middleware that returned an instance of the express app would not be checked with regards to the `enabled` setting found in the `config.json`; thus the middleware would have had to handle this setting within the middleware logic itself. The latest change gives more control to the user of the middleware.