docs(zh): update polyfill import according to core-js 3 docs#4940

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haoqunjiang merged 3 commits intovuejs:masterfrom

llccing:patch-1

Jan 28, 2020

Commits on Dec 10, 2019

vue-cli@4 use core.js@^3.4.3
小新
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Commits on Jan 28, 2020