@babel/preset-env/data/built-in-modules.json

{
  "es6.module": {
    "edge": "16",
    "firefox": "60",
    "chrome": "61",
    "safari": "10.1",
    "opera": "48",
    "ios_saf": "10.3",
    "and_chr": "71",
    "and_ff": "64"
  }
}