[tests-only] Enable phan version 3

[phil-davis]

Description

phan major version 3 has been released for a while now - use it.

In this repo, it "just works", no other changes needed.

How Has This Been Tested?

CI

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.

[codecov[bot]]

Codecov Report

Merging #173 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #173   +/-   ##
=========================================
  Coverage     85.67%   85.67%           
  Complexity      235      235           
=========================================
  Files            36       36           
  Lines          1117     1117           
=========================================
  Hits            957      957           
  Misses          160      160           

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update f6e1645...5257576. Read the comment docs.