Update dependency mistune to v2 [SECURITY]

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mistune	==0.8.4 -> ==2.0.3

GitHub Vulnerability Alerts

CVE-2022-34749

In Mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.

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Release Notes

lepture/mistune

v2.0.3

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v2.0.2

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Fix escape_url via https://github.com/lepture/mistune/pull/295

v2.0.1

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Fix XSS for image link syntax.

v2.0.0

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First release of Mistune v2.

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Configuration

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[webteam-app]

renovate[bot] is not a collaborator of the repo

[bartaz]

Blocked by templatefinder depending on mistune 0.8.4 (https://github.com/canonical/canonicalwebteam.templatefinder/issues/26)