.babelrc

{
  "env": {
    "test": {
      "presets": [
        ["@babel/preset-env", {"useBuiltIns": "usage","corejs": 3, "bugfixes": true, "forceAllTransforms": true}],
        ["@babel/preset-react", {"useBuiltIns": true}],
        "jest"
      ],
      "plugins": [
        "@babel/plugin-syntax-dynamic-import",
        "@babel/plugin-proposal-class-properties",
        "@babel/plugin-transform-async-to-generator",
        "@babel/plugin-transform-modules-commonjs",
        "@babel/plugin-transform-shorthand-properties",
        "babel-plugin-transform-inline-consecutive-adds",
        "babel-plugin-minify-constant-folding",
        "babel-plugin-minify-flip-comparisons",
        "babel-plugin-transform-merge-sibling-variables"
      ],
       "ignore": [
        "/(node_modules|bower_components)/",
        "**/build/**/*",
        "**/public/**/*",
        "**/webpack/**/*",
        "**/.github/**/*",
        "**/coverage/**/*",
        ".eslintrc",
        ".stylelintrc",
        ".prettierrc",
        ".browserslistrc",
        ".editorconfig",
        "babel.babel.custom.config.js",
        "vendors.js",
        "postcss.config.js",
        "webpack.config.js",
        "package.json",
        "package-lock.json",
        "README.md",
        "LICENSE.md",
         ".gitignore"
      ]
    }
  }
}