[ci skip] Update changelog

changelog.md

-# Next
+# 2.0.0-rc7
 - [FEATURE] Throw an error if no where clause is given to `Model.destroy()`.
 - [FEATURE] Throw an error if no where clause is given to `Model.destroy()`.
 - [BUG] Fixed issue with `order: sequelize.literal('string')`
 - [BUG] Fixed issue with `order: sequelize.literal('string')`
 - [FEATURE] add `clone: true` support to `.get()`. Is needed when using `delete` on values from a `.get()` (`toJSON()`, `this.values`). (.get() is just a reference to the values for performance reasons when there's no custom getters or includes)
 - [FEATURE] add `clone: true` support to `.get()`. Is needed when using `delete` on values from a `.get()` (`toJSON()`, `this.values`). (.get() is just a reference to the values for performance reasons when there's no custom getters or includes)