Update dependency @vue/test-utils to v1.0.0-beta.30

Author: renovate-bot

client/package-lock.json

@@ -34,7 +34,7 @@
     "@vue/cli-service": "4.0.5",
     "@vue/eslint-config-airbnb": "5.0.0",
     "@vue/eslint-config-typescript": "5.0.0",
-    "@vue/test-utils": "1.0.0-beta.29",
+    "@vue/test-utils": "1.0.0-beta.30",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "10.0.2",
     "eslint": "6.6.0",