Use GitHubPaginator for all list GitHub api calls

[soullivaneuh]

For example, this is wrong:

dev-kit/src/Console/Command/MergeConflictsCommand.php

Line 59 in 8956619

foreach ($this->githubClient->pullRequests()->all(static::GITHUB_GROUP, $repositoryName) as $pullRequest) {

Because if a project has many opened PR, we will have only the page 1, not all of them.