chore(readme): remove Greenkeeper badge
chore(readme): remove Greenkeeper badge
SigmaITC/sigmaitc.github.io,SigmaITC/sigmaitc.github.io,SigmaITM/sigmaitm.github.io,SigmaITM/sigmaitm.github.io,SigmaITC/sigmaitc.github.io,SigmaITC/sigmaitc.github.io