Added paginated call for getRepos

[srealmoreno]

GitHub REST API returns paginated repositories in sets of 30 as default. In accounts with large number of repositories, this creates an issue where only first 30 repositories are synced with specified labels. Converted this call to paginated call provided by octocat js.

#25

Thanks @davinc

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This discussion was created from the release Added paginated call for getRepos.