update dependencies

package.json

@@ -23,17 +23,17 @@
   },
   "homepage": "https://github.com/youzan/vant-weapp#readme",
   "devDependencies": {
-    "@babel/core": "^7.4.5",
+    "@babel/core": "^7.5.5",
     "@babel/plugin-syntax-dynamic-import": "^7.2.0",
-    "@babel/preset-env": "^7.4.5",
+    "@babel/preset-env": "^7.5.5",
     "@vant/doc": "^2.4.0",
-    "@vant/eslint-config": "^1.2.3",
+    "@vant/eslint-config": "^1.2.4",
     "@vant/icons": "1.1.11",
-    "@vant/markdown-loader": "^2.0.0",
-    "autoprefixer": "^9.6.0",
+    "@vant/markdown-loader": "^2.2.0",
+    "autoprefixer": "^9.6.1",
     "babel-loader": "8.0.6",
     "cross-env": "^5.1.4",
-    "css-loader": "^3.0.0",
+    "css-loader": "^3.2.0",
     "cssnano": "^4.1.10",
     "eslint": "^6.1.0",
     "gh-pages": "^2.0.1",
@@ -49,14 +49,14 @@
     "miniprogram-api-typings": "2.4.2-2",
     "postcss-loader": "^3.0.0",
     "progress-bar-webpack-plugin": "^1.11.0",
-    "style-loader": "^0.23.1",
-    "typescript": "^3.5.2",
+    "style-loader": "^1.0.0",
+    "typescript": "^3.5.3",
     "vue": "2.6.10",
-    "vue-loader": "^15.4.2",
-    "vue-router": "^3.0.6",
+    "vue-loader": "^15.7.1",
+    "vue-router": "^3.1.1",
     "vue-template-compiler": "2.6.10",
-    "webpack": "^4.35.0",
-    "webpack-cli": "^3.3.4",
+    "webpack": "^4.39.1",
+    "webpack-cli": "^3.3.6",
     "webpack-serve": "^2.0.3"
   }
 }