fix(deps): update dependency grunt-git-authors to v3

This MR contains the following updates:

Package	Change	Age	Confidence
grunt-git-authors	1.0.0 -> 3.2.0

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Release Notes

scottgonzalez/grunt-git-authors (grunt-git-authors)

v3.2.0

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v3.1.1

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v3.1.0

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v3.0.0

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v2.0.1

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v2.0.0

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v1.2.0

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v1.1.0

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