Fix/issue 2319 throw first error thrown during mount#2428

cexbrayat merged 4 commits intovuejs:mainvuejs/test-utils:mainfrom

taku-y-9308:fix/issue-2319-throw-first-error-thrown-during-mounttaku-y-9308/test-utils:fix/issue-2319-throw-first-error-thrown-during-mountCopy head branch name to clipboard