update go mod#2

Open

skyinglyh1 wants to merge 4 commits into

polynetwork:mainfrom

skyinglyh1:main

Commits on Jan 21, 2021

update go mod
skyinglyh1
committed

Commits on Jan 25, 2021

resync previous 21 blocks to prevent orphan block when restarting
skyinglyh1
committed

Commits on Jan 26, 2021