[mock-chronik-client] Patch repo path in package.json

Summary: Update the package.json path now that this repo has moved. minor version bump so we can test automated npm publishing.

Test Plan: Proofread

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D15657