Drop support for older versions of go
Drop support for older versions of go

venkey-ariv/fullerite,mikepea/fullerite,mikepea/fullerite,venkey-ariv/fullerite,baris/fullerite,baris/fullerite,Yelp/fullerite,baris/fullerite,baris/fullerite,mikepea/fullerite,Yelp/fullerite,Yelp/fullerite,mikepea/fullerite,venkey-ariv/fullerite,venkey-ariv/fullerite,Yelp/fullerite