feat: Add p.value and p.precision arguments to fit_power_law() to control the computation of the p-value

[szhorvat]

…led in fit_power_law() with the plfit method

This PR is to help make quicker progress on #1158. It is not finished: a decision must be made on the interface of requesting a p-value calculation. Please see #1158 (comment)

Can someone please take this over from here?

[aviator-app]

Current Aviator status

Aviator will automatically update this comment as the status of the PR changes.
Comment /aviator refresh to force Aviator to re-examine your PR (or learn about other /aviator commands).

This PR was merged using Aviator.

---

See the real-time status of this PR on the Aviator webapp.

Use the Aviator Chrome Extension to see the status of your PR within GitHub.

[aviator-app]

This pull request can't be queued because it's currently a draft.

[aviator-app]

This pull request failed to merge: some required checks failed. After you have resolved the problem, you should remove the blocked pull request label from this PR and then try to re-queue the PR. Note that the pull request will be automatically re-queued if it has the mergequeue label.

Failed checks: Check ubuntu-20.04 (oldrel-2), Check ubuntu-20.04 (release)

[aviator-app]

This pull request failed to merge: some required checks failed. After you have resolved the problem, you should remove the blocked pull request label from this PR and then try to re-queue the PR. Note that the pull request will be automatically re-queued if it has the mergequeue label.

Failed checks: Check ubuntu-20.04 (oldrel-1), Check ubuntu-20.04 (oldrel-3)

[szhorvat]

@krlmlr Thanks for taking this over! Let me know if you need any help/input from me specifically.