Update dependency markdown-it-table-of-contents to ^0.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
markdown-it-table-of-contents	^0.6.0 -> ^0.9.0

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Release Notes

cmaas/markdown-it-table-of-contents (markdown-it-table-of-contents)

v0.9.0

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• Added: Headlines can now be omitted from the table of contents by placing a special HTML comment tag before the headline (fixes #​65).
• Added: Option omitTag can override the default tag <!-- omit from toc -->

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v0.8.0

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• Added: Option getTokensText to override how text is extracted from tokens to build headlines and slugs (fixes #​61), similar to the function in markdown-it-anchor.

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v0.7.0

Compare Source

• Added: Override the container element
• ⚠️ BREAKING CHANGE: The plugin moved from inline mode to block mode (fixes #​62)
• Changed: Updated tests, readme etc.
• Removed: Old forceFullToc attribute

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