Bump drift from 2.20.3 to 2.21.0

[dependabot]

Bumps drift from 2.20.3 to 2.21.0.

Release notes

Sourced from drift's releases.

Drift 2.21.0

Versions 2.21.0 of drift and drift_dev as well as version 0.2.1 of drift_flutter have just been released:

Core changes

• View.from is now declared to return a JoinedSelectStatement, the type it returns at runtime.
• The manager APIs now support computed fields, allowing advanced SQL expressions to be embedded into simple manager queries.

Isolate improvements

• To infer whether serialization is required for inter-isolate communication, drift now sends a test message instead of serializing by default.
• drift_flutter: Enable serialization between background isolates where necessary.

Tooling and generator

• The DevTools extension can now clear drift databases.
• Fix Dart-defined check constraints not being considered in exported schemas.
• Columns can now be defined with late final fields. Defining columns with getters => is still supported too.

  class MyTable extends Table {
    // Before:
    IntColumn get id => integer().autoIncrement()();
  // After:
  late final id = integer().nullable()();
  }

• Make build.yaml definitions pass build_runner doctor.
• Fix generate_manager option not consistently being applied to modular builds.
• Add the make-migrations command which combines the existing schema commands into a single tool.

Commits

• 3c11432 Prepare release
• d7cc547 Allow using group by on view without join
• f89a8eb Merge pull request #3278 from simolus3/fix-related-relations-on-manager
• 9a8def1 Merge branch 'develop' into fix-related-relations-on-manager
• fb71a56 move regression test into tests
• bd80a46 Devtools extension: Button to clear database
• 4cadb06 Merge pull request #3250 from simolus3/drift_migrator_tool
• 2ef6c60 Attempt to fix Flutter CI
• 04a046d Fix migration tooling test
• 1d742e0 Add changelog entry
• Additional commits viewable in compare view

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[dependabot]

Looks like drift is up-to-date now, so this is no longer needed.