initialize Pry.config in Pry.reset_defaults(revisit later).
initialize Pry.config in Pry.reset_defaults(revisit later).

we don't want to depend on Pry.reset_defaults if we can avoid it.
`Pry.config` being a lazy-loaded value has benefits. I'll try to
revisit this later when the rest of the new work on Pry::Config
and Pry::Config::Default is finished.

85x14/pry,scalixte-mdsol/pry,sideci-sample/sideci-sample-pry,ooohiroyukiooo/pry,scalixte-mdsol/pry,85x14/pry,caporta/pry,printercu/pry,pvdb/pry,ooohiroyukiooo/pry,raeno/pry,nju520/pry,caporta/pry,raeno/pry,caporta/pry,gfvcastro/pry,ngpestelos/pry,gfvcastro/pry,nju520/pry,jasonm23/pry,tdg5/pry,tdg5/pry,geoffreylitt/pry,printercu/pry,sferik/pry,ngpestelos/pry,josue804/debunker,shockone/pry,sferik/pry,jasonm23/pry,raeno/pry,nju520/pry,pvdb/pry,geoffreylitt/pry,shockone/pry,icebreaker/pry,shockone/pry,85x14/pry,jasnow/pry,josue804/debunker,jasonm23/pry,tdg5/pry,jasnow/pry,jasnow/pry,bronzdoc/pry,icebreaker/pry,ooohiroyukiooo/pry,scalixte-mdsol/pry,bronzdoc/pry