Build: Update webpack to v5.x

Update webpack version to latest version https://www.npmjs.com/package/webpack. This aligns closer with how the Gutenberg plugin handles WordPress packages. Related update in Gutenberg from August 2021: https://github.com/WordPress/gutenberg/pull/33818.

Props walbo, desrosj, mukesh27.
Fixes #51750.




git-svn-id: https://develop.svn.wordpress.org/trunk@53135 602fd350-edb4-49c9-b593-d223f7449a82

package.json

@@ -24,16 +24,14 @@
 		"last 2 Opera versions"
 	],
 	"devDependencies": {
-		"@wordpress/babel-preset-default": "6.4.1",
-		"@wordpress/custom-templated-path-webpack-plugin": "2.1.0",
-		"@wordpress/dependency-extraction-webpack-plugin": "3.2.1",
+		"@wordpress/babel-preset-default": "6.8.0",
+		"@wordpress/dependency-extraction-webpack-plugin": "3.4.1",
 		"@wordpress/e2e-test-utils": "5.4.10",
-		"@wordpress/library-export-default-webpack-plugin": "2.2.0",
-		"@wordpress/scripts": "19.2.4",
+		"@wordpress/scripts": "22.4.0",
 		"autoprefixer": "^9.8.8",
 		"chalk": "4.1.2",
 		"check-node-version": "4.2.1",
-		"copy-webpack-plugin": "^5.1.2",
+		"copy-webpack-plugin": "10.2.4",
 		"cssnano": "4.1.11",
 		"dotenv": "16.0.0",
 		"dotenv-expand": "8.0.3",
@@ -57,7 +55,7 @@
 		"grunt-replace-lts": "~1.1.0",
 		"grunt-rtlcss": "~2.0.2",
 		"grunt-sass": "~3.1.0",
-		"grunt-webpack": "^4.0.3",
+		"grunt-webpack": "5.0.0",
 		"ink-docstrap": "1.3.2",
 		"install-changed": "1.1.0",
 		"jest-image-snapshot": "3.0.1",
@@ -67,14 +65,13 @@
 		"sass": "^1.50.0",
 		"sinon": "~13.0.1",
 		"sinon-test": "~3.1.3",
-		"source-map-loader": "^1.1.3",
+		"source-map-loader": "3.0.1",
+		"terser-webpack-plugin": "5.3.1",
 		"uglify-js": "^3.15.3",
-		"uglifyjs-webpack-plugin": "2.2.0",
 		"uuid": "8.3.2",
 		"wait-on": "6.0.1",
-		"webpack": "4.43.0",
-		"webpack-dev-server": "3.11.2",
-		"webpack-livereload-plugin": "2.3.0"
+		"webpack": "5.72.0",
+		"webpack-livereload-plugin": "3.0.2"
 	},
 	"dependencies": {
 		"@wordpress/a11y": "3.2.4",