Update dependency marked to v18

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
marked (source)	^17.0.0 → ^18.0.0

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Release Notes

markedjs/marked (marked)

v18.0.2

Compare Source

v18.0.1

Compare Source

v18.0.0

Compare Source

Bug Fixes

• Bump typescript from 5.9.3 to 6.0.2 (#​3934) (e8efc51)
• prevent GFM table tokens from greedily capturing trailing newlines (#​3926) (40f2665)
• prevent heading and def tokens from greedily capturing multiple newlines (#​3925) (b379e3e)
• trim blank lines from block tokens (#​3939) (b70895f)

BREAKING CHANGES

• trim trailing blank lines from block tokens
• update Typescript to v6

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