Only test against Ruby 2.x
Only test against Ruby 2.x

Sidekiq droppped support for 1.9.3.

vivekiitkgp/snpr,vivekiitkgp/snpr,gedankenstuecke/snpr,openSNP/snpr,philippbayer/snpr,openSNP/snpr,gedankenstuecke/snpr,openSNP/snpr,vivekiitkgp/snpr,vivekiitkgp/snpr,philippbayer/snpr,gedankenstuecke/snpr,openSNP/snpr,gedankenstuecke/snpr,philippbayer/snpr,philippbayer/snpr