upgrade devDependencies

Author: qinshenxue

package.json

@@ -17,36 +17,35 @@
     "bugs": {
         "url": "https://github.com/qinshenxue/vue2-vue-router2-webpack2/issues"
     },
-    "homepage": "https://github.com/qinshenxue/vue2-vue-router2-webpack2#readme",
+    "homepage":
+        "https://github.com/qinshenxue/vue2-vue-router2-webpack2#readme",
     "devDependencies": {
-        "autoprefixer": "^6.7.5",
+        "autoprefixer": "^7.2.5",
         "babel-core": "^6.26.0",
         "babel-loader": "^7.1.2",
         "babel-plugin-syntax-dynamic-import": "^6.18.0",
-        "babel-preset-env": "^1.6.0",
-        "css-loader": "^0.28.4",
+        "babel-preset-env": "^1.6.1",
+        "css-loader": "^0.28.9",
         "cssnano": "^3.10.0",
-        "element-ui": "^2.0.3",
-        "extract-text-webpack-plugin": "^3.0.0",
-        "file-loader": "^0.11.2",
+        "extract-text-webpack-plugin": "^3.0.2",
+        "file-loader": "^1.1.6",
         "friendly-errors-webpack-plugin": "^1.6.1",
         "html-webpack-plugin": "^2.30.1",
-        "less": "^2.7.2",
+        "less": "^2.7.3",
         "less-loader": "^4.0.5",
-        "mint-ui": "^2.2.9",
-        "node-sass": "^4.5.3",
-        "opn": "^4.0.2",
-        "postcss-loader": "^1.3.1",
+        "node-sass": "^4.7.2",
+        "opn": "^5.2.0",
+        "postcss-loader": "^2.0.10",
         "sass-loader": "^6.0.6",
         "stylus": "^0.54.5",
-        "stylus-loader": "^2.5.0",
+        "stylus-loader": "^3.0.1",
         "url-loader": "^0.5.9",
-        "vue": "^2.5.2",
-        "vue-loader": "^13.3.0",
+        "vue": "^2.5.13",
+        "vue-loader": "^13.7.0",
         "vue-router": "^3.0.1",
-        "vue-template-compiler": "^2.5.2",
-        "webpack": "^3.6.0",
-        "webpack-dev-server": "^2.9.1",
-        "webpack-merge": "^4.1.0"
+        "vue-template-compiler": "^2.5.13",
+        "webpack": "^3.10.0",
+        "webpack-dev-server": "^2.11.0",
+        "webpack-merge": "^4.1.1"
     }
 }