Bump vega from 0.3.2 to 0.4.0

[dependabot[bot]]

Bumps vega from 0.3.2 to 0.4.0.

Changelog

Sourced from vega's changelog.

0.4.0 (2024-10-22)

• Updated Vega-Lite to 5.21.0 and Vega-Embed to 6.26.0
• Dropped support for Ruby < 3.1 and Rails < 7

Commits

• 2dc6c18 Version bump to 0.4.0 [skip ci]
• 9907d16 Synced versions [skip ci]
• df6adb0 Updated Vega-Lite to 5.21.0 and Vega-Embed to 6.26.0
• f838011 Dropped support for Ruby < 3.1 and Rails < 7
• 14a517a Only add assets to precompile list for Sprockets
• See full diff in compare view

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