fix: use object destructuring in getBundleDirFromCompiler

Fix ESLint prefer-destructuring error by using object destructuring
when extracting outputFileSystem from the compiler object.

Author: Br1an67

src/BundleAnalyzerPlugin.js

@@ -229,17 +229,19 @@ class BundleAnalyzerPlugin {
   }
 
   getBundleDirFromCompiler() {
-    const outputFileSystem =
-      /** @type {OutputFileSystem} */
-      (/** @type {Compiler} */ (this.compiler).outputFileSystem);
+    const { outputFileSystem } = /** @type {Compiler} */ (this.compiler);
+
+    // TypeScript thinks `outputFileSystem` can be null, but in practice it's always set
+    // when this method is called
+    const outputFs = /** @type {OutputFileSystem} */ (outputFileSystem);
 
     // Detect `memfs` (used by webpack-dev-server 4+) by checking for the `__vol` property
     // Related: #471
-    if (/** @type {{ __vol?: unknown }} */ (outputFileSystem).__vol) {
+    if (/** @type {{ __vol?: unknown }} */ (outputFs).__vol) {
       return null;
     }
 
-    const outputFileSystemConstructor = outputFileSystem.constructor;
+    const outputFileSystemConstructor = outputFs.constructor;
 
     if (typeof outputFileSystemConstructor === "undefined") {
       return /** @type {Compiler} */ (this.compiler).outputPath;