Update inflection dependency to v1.5.2

`inflection` module was updated last night to address it failing to correctly pluralize the words "access" and "business". "Business" was correctly pluralized as "businesses" in inflection v.1.4.x but this was broken in v.1.5.0, and v1.5.2 repairs it.

That apart, the version bump to v1.5.2 makes no other changes.

This PR updates Sequelize's inflection dependency to v.1.5.2