bundling refactor

plugins/dbgate-plugin-csv/webpack-backend.config.js

@@ -1,6 +1,10 @@
 var webpack = require('webpack');
 var path = require('path');
 
+const packageJson = require('./package.json');
+const buildPluginExternals = require('../../common/buildPluginExternals');
+const externals = buildPluginExternals(packageJson);
+
 var config = {
   context: __dirname + '/src/backend',
 
@@ -19,11 +23,7 @@ var config = {
   //     minimize: false,
   //   },
 
-  externals: {
-    csv: 'commonjs csv',
-    'line-reader': 'commonjs line-reader',
-    lodash: 'commonjs lodash',
-  },
+  externals,
 };
 
 module.exports = config;