Critical and high vulnerability from npm audit

## Npm Audit has 1 critical vulnerability and 3 high

This is causing build pipelines to fail.

### Packages with issues are:

### mock => Growl https://npmjs.com/advisories/146 

### method-overrride => https://npmjs.com/advisories/538

### Express - https://npmjs.com/advisories/526

Updates to fix: 

"express": "4.17.1",

"method-override": "2.3.8",

"mocha": "4.0.1",




