chore(v2): fix javascript-serialize vulnerability (#3282)

* try to fix the javascript-serialize vulnerability

* handle CopyWebpackPlugin breaking change

packages/docusaurus/package.json

@@ -58,7 +58,7 @@
     "chalk": "^3.0.0",
     "chokidar": "^3.3.0",
     "commander": "^4.0.1",
-    "copy-webpack-plugin": "^5.0.5",
+    "copy-webpack-plugin": "^6.0.3",
     "core-js": "^2.6.5",
     "css-loader": "^3.4.2",
     "del": "^5.1.0",

packages/docusaurus/src/commands/build.ts

@@ -76,12 +76,14 @@ export default async function build(
   if (fs.existsSync(staticDir)) {
     serverConfig = merge(serverConfig, {
       plugins: [
-        new CopyWebpackPlugin([
-          {
-            from: staticDir,
-            to: outDir,
-          },
-        ]),
+        new CopyWebpackPlugin({
+          patterns: [
+            {
+              from: staticDir,
+              to: outDir,
+            },
+          ],
+        }),
       ],
     });
   }