rev to 2.3.2 in prep for publishing

[devoncarew]

• rev to 2.3.2 in prep for publishing

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• I’ve reviewed the contributor guide and applied the relevant portions to this PR.

Contribution guidelines:

• See our contributor guide for general expectations for PRs.
• Larger or significant changes should be discussed in an issue before creating a PR.
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[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:graphs	2.3.2	ready to publish	graphs-v2.3.2
package:cli_config	0.2.1-wip	WIP (no publish necessary)
package:extension_discovery	2.0.1-wip	WIP (no publish necessary)
package:unified_analytics	6.1.3-wip	WIP (no publish necessary)

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.