[ty] Update mypy primer

[MichaReiser]

Summary

Pulls in hauntsaninja/mypy_primer#171 which configures psycopg's src root

Thanks @sharkdp for making the change upstream

Test Plan

CI

[github-actions]

mypy_primer results

No ecosystem changes detected ✅

[MichaReiser]

It's disappointing that we don't see any mypy primer changs but makes sense, given that it mainly tests the binary.

[carljm]

Not sure I understand how it's possible that we see no primer diff here, if the mypy-primer change is working correctly, since my understanding is we previously weren't really checking any of the psycopg source code?

But this certainly doesn't seem to do any harm!

[AlexWaygood]

Not sure I understand how it's possible that we see no primer diff here, if the mypy-primer change is working correctly, since my understanding is we previously weren't really checking any of the psycopg source code?

It's because we're running the same version of primer on this commit and the commit prior to this commit and then diffing the two sets of diagnostics. Since the same version of primer is being run on both commits, the same psycopg config is being used for both primer runs.