chore(package): update @vue/test-utils to version 1.0.3

Closes #43

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
     "@vue/cli-plugin-unit-jest": "^4.1.0",
     "@vue/cli-service": "^4.1.0",
     "@vue/eslint-config-prettier": "^5.0.0",
-    "@vue/test-utils": "1.0.0-beta.29",
+    "@vue/test-utils": "1.0.3",
     "babel-eslint": "^10.0.3",
     "eslint": "^5.16.0",
     "eslint-plugin-prettier": "^3.1.1",