Change what github_url helper method returns
Change what github_url helper method returns

Token based auth is going away, so the default full url if the client is
authenticated should use the basic auth format.

This only matters if in the spec you don't specify the full url, e.g.
`/authorizations`

synmnstr/octokit.rb,sferik/octokit.rb,byroot/octokit.rb,AnNOtis/octokit.rb,AnNOtis/octokit.rb,raysrashmi/octokit.rb,pvdb/octokit.rb,daukantas/octokit.rb,cocktail-io/octokit.rb,benbalter/octokit.rb,cocktail-io/octokit.rb,Ladiijae/octokit.rb,JuanitoFatas/octokit.rb,nilbus/octokit.rb,octokit/octokit.rb,benbalter/octokit.rb,tarebyte/octokit.rb,Neo20067/octokit.rb,pwz3n0/octokit.rb,Tadeirro/octokit.rb,LizzHale/octokit.rb,xantage/octokit.rb,pezholio/octokit.rb,whip112/octokit.rb,iainbeeston/octokit.rb,moodyredistribution/octokit.rb,r7kamura/octokit.rb,Payro93/octokit.rb,LizzHale/octokit.rb,christer155/octokit.rb,Tadeirro/octokit.rb,raysrashmi/octokit.rb,hoorayimhelping/octokit.rb,kv109/octokit.rb,BreemsEmporiumMensToiletriesFragrances/octokit.rb,BreemsEmporiumMensToiletriesFragrances/octokit.rb,Payro93/octokit.rb,iainbeeston/octokit.rb,r7kamura/octokit.rb,christer155/octokit.rb,stetsenko/octokit.rb,simon0191/octokit.rb,xantage/octokit.rb,sferik/octokit.rb,simon0191/octokit.rb,stetsenko/octokit.rb,synmnstr/octokit.rb,pwz3n0/octokit.rb,pvdb/octokit.rb,octokit/octokit.rb,hoorayimhelping/octokit.rb,tarebyte/octokit.rb,JuanitoFatas/octokit.rb,Neo20067/octokit.rb,kv109/octokit.rb,byroot/octokit.rb,daukantas/octokit.rb,whip112/octokit.rb,nilbus/octokit.rb,Ladiijae/octokit.rb,moodyredistribution/octokit.rb,pezholio/octokit.rb