one more optimalization of plugin size & load time

plugins/dbgate-plugin-postgres/src/frontend/Dumper.js

@@ -1,4 +1,4 @@
-const SqlDumper = require('dbgate-tools/lib/SqlDumper');
+const { SqlDumper } = global.DBGATE_TOOLS;
 
 class Dumper extends SqlDumper {
   /** @param type {import('dbgate-types').TransformType} */

plugins/dbgate-plugin-postgres/src/frontend/drivers.js

@@ -1,4 +1,4 @@
-const driverBase = require('dbgate-tools/lib/driverBase');
+const { driverBase } = global.DBGATE_TOOLS;
 const Dumper = require('./Dumper');
 
 /** @type {import('dbgate-types').SqlDialect} */

plugins/dbgate-plugin-postgres/webpack-frontend.config.js

@@ -1,20 +1,26 @@
-var webpack = require("webpack");
-var path = require("path");
+var webpack = require('webpack');
+var path = require('path');
 
 var config = {
-  context: __dirname + "/src/frontend",
+  context: __dirname + '/src/frontend',
 
   entry: {
-    app: "./index.js",
+    app: './index.js',
   },
-  target: "web",
+  target: 'web',
   output: {
-    path: path.resolve(__dirname, "dist"),
-    filename: "frontend.js",
-    libraryTarget: "var",
+    path: path.resolve(__dirname, 'dist'),
+    filename: 'frontend.js',
+    libraryTarget: 'var',
     library: 'plugin',
   },
 
+  plugins: [
+    new webpack.DefinePlugin({
+      'global.DBGATE_TOOLS': 'window.DBGATE_TOOLS',
+    }),
+  ],
+
   // uncomment for disable minimalization
   // optimization: {
   //   minimize: false,