CD: Deployment script fails when master updated with same version

[andrewconnell]

Expected Behavior

When updating the master branch, if the version listed in package.json is the same version as the most recent tag in the repo, abort the deployment script. This implies that while master was updated, no release should happen.

Actual Behavior

Build fails... for example: https://circleci.com/gh/ngOfficeUIFabric/ng-officeuifabric/240

Steps to Reproduce Behavior

Update master but don't change the version in package.json

This is a minor issue... master isn't normally updated unless cutting a release. It only causes the CI build to fail, but it has zero impact to anything.