[fix] cover BC cases

release: 2.0.0-rc1

[release 2.0.0-dev13]

Merge pull request sequelize#2167 from LJ1102/chainable-hooks-1.7.x

Allow to chain hook definitions migrates LJ1102/sequelize@dd0089105

[release 2.0.0-dev12

[release 1.7.9]

1.7.8

release 1.7.7

1.7.6

Merge branch '1.7.0' of github.com:sequelize/sequelize into 1.7.0