chore(deps): update dependency migratus/migratus to v1.5.6

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
migratus/migratus	patch	1.5.4 -> 1.5.6

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Release Notes

yogthos/migratus (migratus/migratus)

### [`v1.5.6`](https://togithub.com/yogthos/migratus/blob/HEAD/CHANGES.md#156) [Compare Source](https://togithub.com/yogthos/migratus/compare/v1.5.5...v1.5.6) - [Fix spec problem for next.jdbc.sql/insert! and next.jdbc.sql/delete! ](https://togithub.com/yogthos/migratus/pull/262) ### [`v1.5.5`](https://togithub.com/yogthos/migratus/blob/HEAD/CHANGES.md#155) [Compare Source](https://togithub.com/yogthos/migratus/compare/v1.5.4...v1.5.5) - [allow migrations when next.jdbc.transaction/*nested-tx* is set to :prohibit](https://togithub.com/yogthos/migratus/pull/261)

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