Update dependency eslint-plugin-vue to v9

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint-plugin-vue (source)	8.7.1 -> 9.1.1

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This MR has been generated by Renovate Bot.

added dependencies label

assigned to @Griefed

restored source branch renovate-eslint-plugin-vue-9.x

mentioned in issue #2 (closed)

changed the description

merged