fix(deps): update dependency katex to v0.16.18

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
katex (source)	0.16.10 -> 0.16.18

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Release Notes

KaTeX/KaTeX (katex)

v0.16.18

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Bug Fixes

• Actually publish TypeScript type definitions (#​4008) (629b873)

v0.16.17

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Bug Fixes

• MathML combines multidigit numbers with sup/subscript, comma separators, and multicharacter text when outputting to DOM (#​3999) (7d79e22), closes #​3995

v0.16.16

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Features

• ESM exports, TypeScript types (#​3992) (ea9c173)

v0.16.15

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Features

• italic sans-serif in math mode via \mathsfit command (#​3998) (2218901)

v0.16.14

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Features

• \dddot and \ddddot support (#​3834) (bda35cd), closes #​2744

v0.16.13

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Bug Fixes

• \vdots and \rule support in text mode (#​3997) (0e08352), closes #​3990

v0.16.12

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Features

• css: configurable margin for display math (#​3638) (3405001)

v0.16.11

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Features

• add \emph (#​3963) (9f34da4), closes #​3566

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