Update dependency color-string to v1.9.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
color-string	1.6.0 → 1.9.1

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Release Notes

Qix-/color-string (color-string)

v1.9.1

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v1.9.0

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Minor Release 1.9.0

• Add parsing of exponential alpha values for HWB and HSL (#​66)

Thanks to @​babycannotsay for their contribution!

v1.8.2

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Patch release 1.8.2

• Fix incorrect handling of optional comma in rgb() regex (#​65)

Thanks to @​gerdasi and @​mastertheblaster for reporting and confirming the bug!

v1.8.1

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Patch release 1.8.1

• Fix rgb alpha percentage parsing from int to float (#​61)

Thanks to @​clytras for their contribution!

v1.8.0

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Minor release 1.8.0

• Add anchors to keyword regex (#​64)

Thanks to @​cq360767996 for their contribution!

v1.7.4

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Patch Release 1.7.4

• Fix bug in .to.hex() output if the inputs aren't rounded numbers (#​25)

v1.7.3

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Patch Release 1.7.3

• Fix hue modulo operation (#​50)

Thanks to @​adroitwhiz for their contributions.

v1.7.2

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Patch Release 1.7.2

• Fix issue where color-string with incorrectly return a color for properties on Object's prototype like "constructor". (#​45)

Thanks to @​tolmasky for their contributions.

v1.7.1

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Patch release 1.7.1

• Reduce acceptable characters in keyword matching regex (#​42)

Thanks to @​benmccann for their contributions!

v1.7.0

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Minor Release 1.7.0

• Add support for space-separated RGB (#​58)
• Removed Travis CI in favor of Github Actions
• Small repository cleanup.

Thanks to @​JJC1138 and @​clytras for their contributions!

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