Update dependency marked to ^1.2.7

Created by: renovate[bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
marked (source)	^1.2.5 -> ^1.2.7

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Release Notes

markedjs/marked

v1.2.7

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Bug Fixes

• Replace use of startsWith and endsWith with regex for IE11 (#​1877) (4fdde20), closes #​1876

v1.2.6

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Bug Fixes

• fix atx heading and make regex safe (#​1853) (70ee29c) possible breaking change: When using the block.heading rule the text provided in capture group 2 will not be trimmed of whitespace.
• fix link with angle brackets around href (#​1851) (656c3e4)

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