Update versions in devDependencies, fixes: #6
Update versions in devDependencies, fixes: #6

dhritzkiv/ampersand-sync,tnguyen14/ampersand-sync-with-promise,synack/ampersand-sync,naugtur/ampersand-sync,AmpersandJS/ampersand-sync,sauramirez/ampersand-sync,mhamann/ampersand-sync