Ошибка при использовании async/await в React?

export default class SwapiService{
    _apiBase = 'https://swapi.co/api';
    async getResource(url){
        const res = await fetch(`${this._apiBase}${url}`);
        if(!res.ok){
            throw new Error(`Could not fetch ${url}, recived ${res.status}`)
        }
        return await res.json();
    }
    getAllPeople(){
        this.getResource('/people/');
    }
}

{
    "presets": ["@babel/preset-env","@babel/preset-react"],
    "plugins": ["@babel/plugin-proposal-class-properties"]
}

{
  "name": "stardb",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "webpack-dev-server --mode development --open --hot --color",
    "start": "webpack --mode development  --watch",
    "build": "webpack --mode production"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/core": "^7.5.5",
    "@babel/plugin-proposal-class-properties": "^7.5.5",
    "@babel/polyfill": "^7.4.4",
    "@babel/preset-env": "^7.5.5",
    "@babel/preset-es2015": "^7.0.0-beta.53",
    "@babel/preset-react": "^7.0.0",
    "@babel/preset-stage-0": "^7.0.0",
    "babel-loader": "^8.0.6",
    "babel-plugin-transform-runtime": "^6.23.0",
    "css-loader": "^3.1.0",
    "html-webpack-plugin": "^3.2.0",
    "style-loader": "^0.23.1",
    "webpack": "^4.39.0",
    "webpack-cli": "^3.3.6",
    "webpack-dev-server": "^3.7.2"
  },
  "dependencies": {
    "bootstrap": "^4.3.1",
    "react": "^16.8.6",
    "react-bootstrap": "^1.0.0-beta.10",
    "react-dom": "^16.8.6",
    "react-redux": "^7.1.0",
    "redux": "^4.0.4"
  }
}

const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");

module.exports = {
  entry: "./src/index.js",
  output: {
    path: path.join(__dirname, "/dist"),
    filename: "main.js"
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: ["babel-loader"]
      },
      {
        test: /\.css$/,
        use: ["style-loader", "css-loader"]
      },
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: "./src/index.html"
    })
  ]
};