add foreman to development dependencies
add foreman to development dependencies

hackerkid/classroom,jingruoruchu/classroom,BelieveC/classroom,adoosii/classroom,jasnow/classroom,BelieveC/classroom,ConnorCartwright/classroom,RyanTech/classroom,chengjunjian/classroom,jingruoruchu/classroom,nfeliciano/classroom,guoyu07/classroom,nfeliciano/classroom,mostlybadfly/classroom,nfeliciano/classroom,mostlybadfly/classroom,RyanTech/classroom,bhanuc/classroom,bhanuc/classroom,mostlybadfly/classroom,guoyu07/classroom,RyanTech/classroom,mkcode/classroom,chenwenbin928/classroom,ConnorCartwright/classroom,ConnorCartwright/classroom,adoosii/classroom,tjhorner/classroom,BelieveC/classroom,mkcode/classroom,chenwenbin928/classroom,hackerkid/classroom,alejandrogarciasalas/classroom,jasnow/classroom,adoosii/classroom,guoyu07/classroom,jasnow/classroom,tjhorner/classroom,alejandrogarciasalas/classroom,bhanuc/classroom,BelieveC/classroom,alejandrogarciasalas/classroom,tjhorner/classroom,hackerkid/classroom,chengjunjian/classroom,mkcode/classroom,jingruoruchu/classroom,chengjunjian/classroom,chenwenbin928/classroom