feat: Bump up test-utils version to ^1.0.0-beta.30

Denys Mishunovrequested to merge
555-upgrade-test-utils into master

The MR upgrades @vue/test-utils dependency to ^1.0.0-beta.30 to keep the testing framework in sync with GitLab.

Closes #555 (closed)

Edited by Denys Mishunov

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