[ci] stop testing on 0.6
[ci] stop testing on 0.6

paulhroth/winston,jjmleiro/winston,tobli/winston,psquickitjayant/winston,megastef/winston,beni55/winston,DenisGorbachev/winston,aquavitae/winston,unlucio/winston,dbmikus/winston,winstonjs/winston,wancharle/winston,modulexcite/winston,s-panferov/winston,z-10/winston,alinex/winston,get-trucked/winston,SmartNode-es/winston,harriha/winston,thaliproject/winston,rakesh-mohanta/winston,whismat/winston,winstonjs/winston,dustinblackman/winston,nikolas/winston