update money.gemspec to accept i18n master required for rails edge.
update money.gemspec to accept i18n master required for rails edge.

kewaunited/money,AlexVPopov/money,antstorm/money,BrandyMint/money,saizai/money,bonusly/money,envato/money,printercu/money,gregoryhappyfresh/money,insphire/money,RubyMoney/money,richardvenneman/money,maicoin/money,nilbus/money,paulodiniz/money