chore: syntax-dynamic-import

add syntax-dynamic-import babel plugin and update webpack

package.json

@@ -59,6 +59,7 @@
     "babel-jest": "22.4.3",
     "babel-loader": "7.1.4",
     "babel-plugin-flow-runtime": "0.17.0",
+    "babel-plugin-syntax-dynamic-import": "6.18.0",
     "babel-plugin-transform-async-to-generator": "6.24.1",
     "babel-plugin-transform-class-properties": "6.24.1",
     "babel-plugin-transform-decorators-legacy": "1.3.4",
@@ -113,7 +114,7 @@
     "puppeteer": "1.1.1",
     "react": "16.2.0",
     "react-dom": "16.2.0",
-    "react-hot-loader": "4.0.0",
+    "react-hot-loader": "4.2.0",
     "react-router-dom": "4.2.2",
     "react-syntax-highlighter": "5.8.0",
     "rimraf": "2.6.2",
@@ -129,8 +130,9 @@
     "url-loader": "0.6.2",
     "verdaccio-auth-memory": "0.0.4",
     "verdaccio-memory": "1.0.1",
-    "webpack": "4.8.3",
-    "webpack-cli": "2.0.15",
+    "webpack": "4.10.2",
+    "webpack-bundle-analyzer": "2.13.1",
+    "webpack-cli": "3.0.1",
     "webpack-dev-server": "3.1.4",
     "webpack-merge": "4.1.2",
     "whatwg-fetch": "2.0.3"