update: add .PHONY notation to Makefile commands

[chrispaig3]

All Submissions:

• [ x] Have you followed the guidelines in our Contributing document?
• [ x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?

New Feature Submissions:

1. [x ] Does your submission pass tests?
2. [x ] Have you lint your code locally before submission?

Changes to Core Features:

• [ x] Have you added an explanation of what your changes do and why you'd like us to include them?
• [ x] Have you written new tests for your core changes, as applicable?
• [ x] Have you successfully run tests with your changes locally?

[mariocandela]

LGTM