Update Rust crate diesel-async to 0.5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
diesel-async	dependencies	minor	0.4 -> 0.5

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Release Notes

weiznich/diesel_async (diesel-async)

v0.5.1

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• Add crate feature pool for extending connection pool implements through external crate
• Implement Deref and DerefMut for AsyncConnectionWrapper to allow using it in an async context as well

v0.5.0

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• Added type diesel_async::pooled_connection::mobc::PooledConnection
• MySQL/MariaDB now use CLIENT_FOUND_ROWS capability to allow consistent behaviour with PostgreSQL regarding return value of UPDATe commands.
• The minimal supported rust version is now 1.78.0
• Add a SyncConnectionWrapper type that turns a sync connection into an async one. This enables SQLite support for diesel-async
• Add support for diesel::connection::Instrumentation to support logging and other instrumentation for any of the provided connection impls.
• Bump minimal supported mysql_async version to 0.34

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