.babelrc

{
  "env": {
      "test": {
          "plugins": [
              "@babel/plugin-transform-modules-commonjs"
          ]
      }
  },
  "presets": [
    [
      "@babel/preset-env",
      {
        "modules": "commonjs",
        "useBuiltIns": "usage",
        "corejs": 3
      }
    ],
    "@babel/preset-typescript"
  ],
  "plugins": [
    "@babel/plugin-transform-property-literals",
    "@babel/plugin-transform-member-expression-literals",
    "@babel/plugin-proposal-class-properties",
    "@babel/plugin-proposal-object-rest-spread",
    "@babel/plugin-transform-object-assign",
    "@babel/plugin-proposal-optional-chaining",
    "array-includes"
  ]
}