fix Job#close is not working
fix Job#close is not working

parthiban019/jsforce,bhaskarmelkani/jsforce,jsforce/jsforce,nutthawan/jsforce,nutthawan/jsforce,kimchouard/jsforce,jdcrensh/jsforce,bhaskarmelkani/jsforce,jesperkristensen/jsforce,stomita/node-salesforce,lkatney/jsforce,joeferraro/jsforce,parthiban019/jsforce,pcon/jsforce,jesperkristensen/jsforce,pcon/jsforce,saleswise/jsforce,rdietrick/jsforce,polidog/jsforce,pcon/jsforce,saleswise/jsforce,jsforce/jsforce,jsforce/jsforce,jdcrensh/jsforce,saleswise/jsforce,joeferraro/jsforce,lkatney/jsforce