upgraded erlang dependency from r12b to r13b
upgraded erlang dependency from r12b to r13b

oldmantaiter/disco,pombredanne/disco,beni55/disco,ktkt2009/disco,mwilliams3/disco,seabirdzh/disco,scrapinghub/disco,mwilliams3/disco,pooya/disco,pooya/disco,pombredanne/disco,pooya/disco,seabirdzh/disco,pavlobaron/disco_playground,pombredanne/disco,mozilla/disco,beni55/disco,pavlobaron/disco_playground,mozilla/disco,mozilla/disco,discoproject/disco,beni55/disco,ktkt2009/disco,seabirdzh/disco,mwilliams3/disco,ktkt2009/disco,ErikDubbelboer/disco,oldmantaiter/disco,beni55/disco,mwilliams3/disco,ErikDubbelboer/disco,pombredanne/disco,ktkt2009/disco,seabirdzh/disco,simudream/disco,ErikDubbelboer/disco,oldmantaiter/disco,simudream/disco,mozilla/disco,ErikDubbelboer/disco,pombredanne/disco,discoproject/disco,simudream/disco,seabirdzh/disco,scrapinghub/disco,simudream/disco,simudream/disco,oldmantaiter/disco,pavlobaron/disco_playground,pavlobaron/disco_playground,pooya/disco,ktkt2009/disco,scrapinghub/disco,ErikDubbelboer/disco,scrapinghub/disco,discoproject/disco,beni55/disco,mwilliams3/disco,oldmantaiter/disco,discoproject/disco,discoproject/disco