Update dependency vue-multiselect to v3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
vue-multiselect	^2.1.6 -> ^3.0.0

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Release Notes

suadelabs/vue-multiselect (vue-multiselect)

### [`v3.0.0`](https://togithub.com/suadelabs/vue-multiselect/compare/2f6d30fbe9def85069f3e66a9764d2407f26da1b...77aecd10f934e4ae3ee3099faee2826f6ce32bff)

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Configuration

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