Update browser compiler for 1.12.3
Update browser compiler for 1.12.3

shreeve/coffeescript,mrmowgli/coffeescript,AndersonFirmino/coffeescript,jashkenas/coffeescript,cosmicexplorer/coffeescript,jiangmiao/toffee-script,jiangmiao/toffee-script,sjbarag/coffeescript,xixixao/coffee-script,decaffeinate/coffeescript,jiangmiao/toffee-script,AndersonFirmino/coffeescript