-[BUG] Support for plain strings, ints and bools on JSON insert
-[BUG] Fixed regression where `{$in: []}` would result in `IN ()` rather than `IN (NULL)`[#3105](https://github.com/sequelize/sequelize/issues/3105)[#3132](https://github.com/sequelize/sequelize/issues/3132)
-[BUG] Fixed bug where 2 x `belongsToMany` with `foreignKey` but no `otherKey` defined would result in 3 keys instead of 2. [#2991](https://github.com/sequelize/sequelize/issues/2991)