Update package.json (@babel/core@7.4.0 issue)

[oakromulo]

please check these resources below on the reasoning behind this problematic babel bug:

• https://stackoverflow.com/questions/55251983/what-does-this-error-mean-with-usebuiltins-option-required-direct-setting-of

• Unexpected "With useBuiltins option, required direct setting of corejs option" with default configuration parcel-bundler/parcel#2819

• parcel-bundler/parcel@53c09b3

[oakromulo]

see also: #3678

[oakromulo]

directing users to this workaround is also a solid temporary solution:
"resolutions": { "@vue/cli-plugin-babel/**/@babel/core": "^7.0.0 <7.4.0" }

[oakromulo]

p.s. the next babel/core minor release might fix it too, see babel/babel#7646

[sodatea]

Thanks for this PR but we prefer to use the latest version of babel unless there's a serious bug that can't be circumvented. And #3678 was fixed in #3710