Update dependency codemirror to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
codemirror	^5.65.15 → ^6.0.0

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Release Notes

codemirror/basic-setup (codemirror)

v6.0.2

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Bug fixes

Make sure to include a .d.cts file to make TypeScript happy.

v6.0.1

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Bug fixes

Work around limitations in tree-shaking software that prevented basicSetup from being removed when unused.

v6.0.0

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Breaking changes

Change the package name from @codemirror/example-setup to just codemirror.

The package no longer exports EditorState (since that is no longer necessary to set up a basic editor).

New features

The new minimalSetup export provides a minimal set of editor extensions.

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Configuration

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