Release v0.5.1.
Release v0.5.1.

yangit/node-telegram-bot-api,alfcrisci/node-telegram-bot-api,codeRuth/node-telegram-bot-api,DarkScorpion/node-telegram-bot-api,MOSAVI17/Worldbot,ioiasff/frt,vish74/node-telegram-bot-api,tjhorner/node-telegram-bot-api,yagop/node-telegram-bot-api,SerjoPepper/node-telegram-bot-api,rzr775/tryout-bot-not-functionally,palmerabollo/node-telegram-bot-api