Add lock expiration config options to readme.
Add lock expiration config options to readme.

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