Update dependency onevcat/Rainbow to from: "4.2.0"

[renovate]

This PR contains the following updates:

Package	Update	Change
onevcat/Rainbow	minor	from: "4.1.0" -> from: "4.2.0"

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Release Notes

onevcat/Rainbow (onevcat/Rainbow)

v4.2.0

Compare Source

Added

• High-performance StyledStringBuilder API for efficient string chaining (#​78)
• HSL (Hue, Saturation, Lightness) color support with RGB conversion (#​80)
• Strikethrough style support with ANSI escape sequences (#​82)
• Conditional styling feature allowing styles based on conditions (#​81)
• Batch operations API for better performance when applying multiple styles (#​78)
• Comprehensive performance testing framework (#​78)
• Performance optimization guide documentation (#​78)

Fixed

• Memory efficiency improvements in StringGenerator (#​78)
• Performance optimizations for chained style operations (#​78)
• Improved test coverage with comprehensive edge case tests (#​79)

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