fix(deps): update dependency slug to v8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
slug	^4.0.0 -> ^8.0.0

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Release Notes

Trott/slug

v8.2.2

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Bug Fixes

• slugify θ as th (#​354) (19e8ca1)

v8.2.1

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Bug Fixes

• use correct path for CLI (#​352) (f163bd2)

v8.2.0

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Features

• add a minimal CLI (#​351) (92004e7)

v8.1.0

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Features

• add a (painfully minimal) web playground (#​350) (4e1aa40)

v8.0.0

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chore

• remove AMD support (#​345) (2f30cd9)

BREAKING CHANGES

• Loading via AMD will no longer work out-of-the-box.

v7.0.0

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chore

• drop support for Node.js 12.x and 17.x (#​344) (a109d37)

BREAKING CHANGES

• Drop support for Node.js earlier than 14.x.

v6.1.0

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Features

• add fallback option (#​342) (b703043), closes #​341

v6.0.0

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chore

• drop support for IE11 (9927860)

BREAKING CHANGES

• drop support for IE11

v5.3.0

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Features

• add bugs entry to package.json (ca72836)

v5.2.0

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Features

• add ability to set default locale via setLocale() (#​269) (add368d)

5.1.1 (2021-12-13)

Bug Fixes

• consolidate replacement chars from extend() (#​267) (df7a488)

v5.1.1

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Bug Fixes

• consolidate replacement chars from extend() (#​267) (df7a488)

v5.1.0

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Features

• add "trim" option (#​230) (00493cc)

5.0.1 (2021-05-09)

Bug Fixes

• enable characters composed of multiple code points in .extend() (#​217) (5919b6d)

v5.0.1

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Bug Fixes

• enable characters composed of multiple code points in .extend() (#​217) (5919b6d)

v5.0.0

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chore

• drop support for Node.js 10.x (#​209) (e2ee1b8)

BREAKING CHANGES

• Drop support for Node.js 10.x which is now EOL.

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