Update to use dropbox api version 2
Update to use dropbox api version 2

Rory80Hz/hackmd,Yukaii/hackmd,aswathyjacob8/newtest,jccrofty30/hackmd,ironhack/hackmd,jackycute/HackMD,Yukaii/hackmd,Rory80Hz/hackmd,PeterDaveHello/hackmd,PeterDaveHello/hackmd,xnum/hackmd,ironhack/hackmd,Rwing/hackmd,Rwing/hackmd,jackycute/HackMD,xnum/hackmd,Rory80Hz/hackmd,aswathyjacob8/newtest,ironhack/hackmd,jccrofty30/hackmd,PeterDaveHello/hackmd,jackycute/HackMD,Rwing/hackmd,hackmdio/hackmd,xnum/hackmd,aswathyjacob8/newtest,jccrofty30/hackmd,hackmdio/hackmd,hackmdio/hackmd,Yukaii/hackmd