Upgrade create-react-app

package.json

@@ -9,7 +9,7 @@
     "react": "^16.2.0",
     "react-dom": "^16.2.0",
     "react-redux": "^5.1.1",
-    "react-scripts": "1.1.1",
+    "react-scripts": "2.0.3",
     "redux": "^4.0.1",
     "shell-escape": "^0.2.0",
     "webamp": "^1.3.0-beta.0"
@@ -20,5 +20,11 @@
     "test": "react-scripts test --env=jsdom",
     "eject": "react-scripts eject"
   },
-  "prettier": {}
+  "prettier": {},
+  "browserslist": [
+    ">0.2%",
+    "not dead",
+    "not ie <= 11",
+    "not op_mini all"
+  ]
 }

src/WebampComponent.js

@@ -19,8 +19,7 @@ export default class WebampComponent extends React.Component {
   }
 
   async _loadWebamp() {
-    let Webamp;
-    Webamp = await import("webamp");
+    const Webamp = (await import("webamp")).default;
     if (this._unmounted === true) {
       return;
     }