chore(deps): update dependency sequelize to v6.28.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sequelize (source)	6.25.5 -> 6.28.0

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Release Notes

sequelize/sequelize

v6.28.0

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Features

• types: use retry-as-promised types for retry options to match documentation (#​15484) (fd4afa6)

v6.27.0

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Features

• add support for bigints (backport of #​14485) (#​15413) (1247c01)

v6.26.0

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Features

• postgres: add support for lock_timeout [#​15345] (#​15355) (94beace)

v6.25.8

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Bug Fixes

• oracle: remove hardcoded maxRows value (#​15323) (7885000)

v6.25.7

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Bug Fixes

• fix parameters not being replaced when after $$ strings (#​15307) (bc39fd6)

v6.25.6

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Bug Fixes

• postgres: invalidate connection after client-side timeout (#​15283) (a205765), closes /github.com/brianc/node-postgres/blob/5538df6b446f4b4f921947b460fe38acb897e579/packages/pg/lib/client.js#L529

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