Compile C extensions before running tests on Travis.
Compile C extensions before running tests on Travis.

rjocoleman/sidetiq,danilogcarolino/sidetiq,tobiassvn/sidetiq,akhiln/sidetiq,stanchan/sidetiq,vayu-technology/sidetiq,akhiln/sidetiq,atpay/sidetiq,PaulMest/sidetiq,talentpad/sidetiq,stanchan/sidetiq,grzlus/sidetiq,b1tw1se/sidetiq,PaulMest/sidetiq,tomoyuki-yanagisawa/sidetiq-mod,tobiassvn/sidetiq,slategroup/sidetiq,grzlus/sidetiq,flowerett/sidetiq,danilogcarolino/sidetiq,sfroehler/sidetiq,talentpad/sidetiq,kickserv/sidetiq,rjocoleman/sidetiq,slategroup/sidetiq,sfroehler/sidetiq,b1tw1se/sidetiq,flowerett/sidetiq,endofunky/sidetiq,brennovich/sidetiq,tomoyuki-yanagisawa/sidetiq-mod,kickserv/sidetiq,endofunky/sidetiq,brennovich/sidetiq,Altonymous/sidetiq,atpay/sidetiq,vayu-technology/sidetiq