update dependencies

package.json

@@ -26,11 +26,11 @@
     "@babel/plugin-syntax-dynamic-import": "^7.0.0",
     "@babel/preset-env": "^7.1.0",
     "@babel/preset-typescript": "^7.1.0",
-    "autoprefixer": "^9.1.5",
+    "autoprefixer": "^9.2.1",
     "babel-loader": "8.0.4",
     "cross-env": "^5.1.4",
     "css-loader": "^1.0.0",
-    "eslint": "^5.6.1",
+    "eslint": "^5.7.0",
     "eslint-plugin-vue-libs": "^3.0.0",
     "fast-vue-md-loader": "^1.0.3",
     "gh-pages": "^2.0.1",
@@ -46,14 +46,14 @@
     "less-loader": "^4.1.0",
     "postcss-loader": "^3.0.0",
     "progress-bar-webpack-plugin": "^1.11.0",
-    "style-loader": "^0.23.0",
-    "typescript": "^3.1.1",
-    "vant-doc": "^1.0.17",
+    "style-loader": "^0.23.1",
+    "typescript": "^3.1.3",
+    "vant-doc": "^1.0.18",
     "vue": "2.5.17",
     "vue-loader": "^15.4.2",
     "vue-router": "^3.0.1",
     "vue-template-compiler": "2.5.17",
-    "webpack": "^4.20.2",
+    "webpack": "^4.21.0",
     "webpack-cli": "^3.1.2",
     "webpack-serve": "^2.0.2"
   }