Fix: failing tests "Branch names should be removed from Github projects" on PHP 5.6

[Nikschavan]

Bug Report

• Yes, I reviewed the contribution guidelines.
• Yes, more specifically, I reviewed the guidelines on how to write clear bug reports.

Describe the current, buggy behavior

First reported in #300 (comment), The behat tests are failing in WordPress 5.6 because the plugin one-time-login is being downloaded in the tests which requires PHP 7.1

Describe how other contributors can replicate this bug

• Check any GitHub action "Testing" on PHP 5.6 (example)

Describe what you would expect as the correct outcome
No failing tests.

Provide a possible solution

A simple repo, preferably in wp-cli organisation with just the plugin header can be used in the tests so that this error will not happen in future.