gurubot2/.babelrc

{
  "plugins": [
    "@babel/plugin-proposal-object-rest-spread",
    "@babel/plugin-syntax-dynamic-import",
    "@babel/plugin-syntax-import-meta",
    "@babel/plugin-proposal-json-strings",
    ["@babel/plugin-proposal-decorators", { "legacy": true }],
    ["@babel/plugin-proposal-class-properties", { "loose": true }],
    "@babel/plugin-proposal-function-sent",
    "@babel/plugin-proposal-export-namespace-from",
    "@babel/plugin-proposal-numeric-separator",
    "@babel/plugin-proposal-throw-expressions",
    "@babel/plugin-proposal-export-default-from",
    "@babel/plugin-proposal-logical-assignment-operators",
    "@babel/plugin-proposal-optional-chaining",
    [
      "@babel/plugin-proposal-pipeline-operator",
      {
        "proposal": "minimal"
      }
    ],
    "@babel/plugin-proposal-nullish-coalescing-operator",
    "@babel/plugin-proposal-do-expressions",
    "@babel/plugin-proposal-function-bind"
  ],
  "presets": [
    "@babel/preset-react"
  ],
  "env": {
    "production": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "browsers": [
                "last 2 versions",
                "ie >= 10"
              ]
            }
          }
        ]
      ],
      "plugins": [
      ]
    },
    "development": {
      "sourceMaps": "inline"
    },
    "test": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "node": "8"
            }
          }
        ]
      ]
    }
  }
}