Sequelize 3.20.0

　　Sequelize 3.20.0 发布了，Sequelize.js 提供对MariaDB， MySQL，SQLite 以及PostgreSQL 数据库的简单访问，通过映射数据库条目到对象，或者对象到数据库条目。简单的说，就是 ORM(Object-Relational-Mapper)。Sequelize.js 完全是使用 JavaScript 编写，适用于 Node.js 的环境。

　　更新日志：

　　[ADDED] rejectOnEmpty mode #272 #5480

　　[ADDED] beforeCount hook #5209

　　[ADDED] Support for IEEE floating point literals in postgres and sqlite #5194

　　[ADDED] validationFailed hook #1626

　　[FIXED] addColumn with reference in mysql #5592

　　[FIXED] findAndCountAll generates invalid SQL, subQuery moves to LEFT OUTER JOIN#5445

　　[FIXED] count methods pollute the options.includes #4191

　　[FIXED] Invalid SQL generated when using group option along with attributes #3009

　　[FIXED] Mark index as unique: true when type: 'UNIQUE'. Fixes #5351

　　[FIXED] count methods pollute the options.includes #4191

　　[FIXED] Invalid SQL generated when using group option along with attributes #3009

　　[FIXED] Improper escaping of bound arrays of strings on Postgres, SQLite, and Microsoft SQL Server