Updated RELEASES.md for 1.31.0#55678

Merged

bors merged 2 commits intorust-lang:masterfrom

XAMPPRocky:master

Nov 20, 2018

Commits on Nov 9, 2018

Updated RELEASES.md for 1.31.0
Aaron Power
committed

Commits on Nov 20, 2018

Update releases to add rename dependencies feature
Aaronepower
authored