in spec/fetch_version_number_stubs.rb [50:55]
def stub_get_apps_429
success_json = JSON.parse(File.read("spec/fixtures/apps/valid_apps_response.json"))
stub_request(:get, "https://api.appcenter.ms/v0.1/apps")
.to_return(status: 429, headers: { 'Content-Type' => 'application/json' })
end