fix(deps): update dependency dj-database-url to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
dj-database-url (changelog)	^2.0.0 -> ^3.0.0

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Release Notes

jazzband/dj-database-url (dj-database-url)

v3.0.1

Compare Source

• Drop dependency on typing_extensions.

v3.0.0

Compare Source

Bumping to version 3; changes to code do break some API compatability.

• Implement a new decorator registry pattern to impement checks on database connection string.
• You can now support and implement your own database strings by extending the @​register functionality.
• Update supported python versions and django versions.

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