chore: Upgrade dependencies.

Author: jaywcjlove

package.json

@@ -25,21 +25,21 @@
   "author": "Kenny Wang",
   "license": "MIT",
   "dependencies": {
-    "@babel/cli": "^7.2.3",
-    "@babel/core": "^7.3.4",
-    "@babel/plugin-proposal-class-properties": "^7.3.4",
-    "@babel/plugin-syntax-dynamic-import": "^7.2.0",
-    "@babel/plugin-syntax-object-rest-spread": "^7.2.0",
-    "@babel/plugin-transform-async-to-generator": "^7.3.4",
-    "@babel/plugin-transform-runtime": "^7.3.4",
-    "@babel/polyfill": "^7.2.5",
-    "@babel/preset-env": "^7.3.4",
-    "@babel/preset-react": "^7.0.0",
-    "@babel/runtime": "^7.3.4",
+    "@babel/cli": "7.2.3",
+    "@babel/core": "7.3.4",
+    "@babel/plugin-proposal-class-properties": "7.3.4",
+    "@babel/plugin-syntax-dynamic-import": "7.2.0",
+    "@babel/plugin-syntax-object-rest-spread": "7.2.0",
+    "@babel/plugin-transform-async-to-generator": "7.3.4",
+    "@babel/plugin-transform-runtime": "7.3.4",
+    "@babel/polyfill": "7.2.5",
+    "@babel/preset-env": "7.3.4",
+    "@babel/preset-react": "7.0.0",
+    "@babel/runtime": "7.3.4",
     "@nuxtjs/friendly-errors-webpack-plugin": "2.0.2",
-    "babel-eslint": "^10.0.1",
-    "babel-loader": "^8.0.5",
-    "classnames": "^2.2.6",
+    "babel-eslint": "10.0.1",
+    "babel-loader": "8.0.5",
+    "classnames": "2.2.6",
     "colors-cli": "1.0.13",
     "commander": "2.12.2",
     "copy-markdown-image-webpack-plugin": "2.0.0",
@@ -71,10 +71,10 @@
     "raw-content-replace-loader": "1.0.1",
     "raw-extend-loader": "1.0.5",
     "raw-tree-replace-loader": "1.1.0",
-    "react": "^16.8.4",
+    "react": "16.8.4",
     "react-document-title": "2.0.3",
-    "react-dom": "^16.8.4",
-    "react-dynamic-loadable": "^1.1.2",
+    "react-dom": "16.8.4",
+    "react-dynamic-loadable": "1.1.2",
     "react-hot-loader": "4.1.1",
     "react-markdown": "3.3.0",
     "react-router-dom": "4.2.2",
@@ -84,12 +84,11 @@
     "uglifyjs-webpack-plugin": "2.1.1",
     "upath": "1.0.2",
     "url-replace-loader": "1.0.0",
-    "webpack": "4.10.2",
-    "webpack-cli": "3.0.1",
-    "webpack-dev-middleware": "3.1.3",
-    "webpack-dev-server": "3.1.14",
+    "webpack": "4.40.2",
+    "webpack-dev-middleware": "3.7.1",
+    "webpack-dev-server": "3.8.1",
     "webpack-hot-dev-clients": "1.0.4",
-    "webpackbar": "2.6.1",
+    "webpackbar": "4.0.0",
     "write": "1.0.3"
   },
   "devDependencies": {