perf[deps]: move connect to devDependencies

package.json

@@ -37,7 +37,6 @@
     "axios": "0.18.0",
     "clipboard": "1.7.1",
     "codemirror": "5.39.2",
-    "connect": "3.6.6",
     "driver.js": "0.8.1",
     "dropzone": "5.2.0",
     "echarts": "4.1.0",
@@ -77,6 +76,7 @@
     "babel-preset-stage-2": "6.24.1",
     "chalk": "2.4.1",
     "compression-webpack-plugin": "2.0.0",
+    "connect": "3.6.6",
     "copy-webpack-plugin": "4.5.2",
     "cross-env": "5.2.0",
     "css-loader": "1.0.0",