Update dependency shiki to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
shiki (source)	^3.21.0 → ^4.0.0

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Release Notes

shikijs/shiki (shiki)

v4.0.2

Compare Source

   🐞 Bug Fixes

• Support ANSI language with multiple themes  -  by @​dan-lee in #​1259 (2a232)

    View changes on GitHub

v4.0.1

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   🐞 Bug Fixes

• Try fix dts bundle, thanks @​sxzz  -  by @​antfu (1f26c)

    View changes on GitHub

v4.0.0

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   🚨 Breaking Changes

• Drop Node v18 support, remove deprecated APIs  -  by @​antfu in #​1249 (cdca9)

   🚀 Features

• A leaner @shikijs/primitive package  -  by @​antfu in #​1251 (05a77)
• New @shikijs/markdown-exit package  -  by @​antfu (d1257)

    View changes on GitHub

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