chore(package): update @vue/cli-plugin-unit-jest to version 4.1.2

Closes #55

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
   "devDependencies": {
     "@vue/cli-plugin-babel": "^3.8.0",
     "@vue/cli-plugin-eslint": "^3.1.5",
-    "@vue/cli-plugin-unit-jest": "^3.10.0",
+    "@vue/cli-plugin-unit-jest": "^4.1.2",
     "@vue/cli-service": "^3.3.1",
     "@vue/eslint-config-prettier": "^4.0.1",
     "@vue/test-utils": "1.0.0-beta.29",