Add date to 3.1.0 release
Add date to 3.1.0 release

kappezoro/sprockets,masarakki/sprockets,basecamp/sprockets,orlando/sprockets,prusswan/sprockets,jeremy/sprockets,prathamesh-sonpatki/sprockets,guilleiguaran/sprockets,bdezonia/sprockets,maclover7/sprockets,JuanitoFatas/sprockets,byroot/sprockets,Andreis13/sprockets,daniel-rikowski/sprockets,sferik/sprockets,rails/sprockets,jcoyne/sprockets,recursecenter/sprockets,askl56/sprockets,eileencodes/sprockets