Update readme.md

[cipto-hd]

I would like to suggest the the change for the order of passport installation, by running migrate first, then passport:install.
Because I got below errors, if i run passport:install first. Thank you very much for your kind sharing of knowledge and github repository

[Illuminate\Database\QueryException]                                         
  SQLSTATE[HY000]: General error: 1 no such table: oauth_clients (SQL: insert  
   into "oauth_clients" ("user_id", "name", "secret", "redirect", "personal_a  
  ccess_client", "password_client", "revoked", "updated_at", "created_at") va  
  lues (,  Personal Access Client, Ma93UPZSDGZL3TEtKSYEu6kmmKPREtRCEUGR5RLB,   
  http://localhost, 1, 0, 0, 2017-05-08 17:19:22, 2017-05-08 17:19:22))        
                                                                               

                                                                  
  [PDOException]                                                  
  SQLSTATE[HY000]: General error: 1 no such table: oauth_clients