Added 'eltonvs' username to challengers list
Added 'eltonvs' username to challengers list

arthurvasconcelos/write-code-every-day,raphamorim/write-code-every-day,raphamorim/write-code-every-day,pablobfonseca/write-code-every-day,pablobfonseca/write-code-every-day,arthurvasconcelos/write-code-every-day,arthurvasconcelos/write-code-every-day,pablobfonseca/write-code-every-day,raphamorim/write-code-every-day