Build/Test Tools: Update dependencies for bundled themes.

This updates the `devDependencies` for each of the default themes with `package.json` files with a few exceptions:
- `eslint`: This was updated to the latest `8.x` version only since `9.x` is not yet properly supported by `@wordpress/eslint-plugin`.
- `stylelint`-related packages: these updates are resulting in formatting changes. These need to be examined more carefully as they’re likely undesired and require adjustments to the configuration file.

Props peterwilsoncc, desrosj.
Fixes #63171.

git-svn-id: https://develop.svn.wordpress.org/trunk@61206 602fd350-edb4-49c9-b593-d223f7449a82

Author: desrosj

src/wp-content/themes/twentynineteen/package-lock.json

@@ -11,13 +11,13 @@
     "npm": ">=10.2.3"
   },
   "devDependencies": {
-    "@wordpress/browserslist-config": "^6.14.0",
-    "autoprefixer": "^10.4.20",
+    "@wordpress/browserslist-config": "^6.34.0",
+    "autoprefixer": "^10.4.22",
     "chokidar-cli": "^3.0.0",
     "node-sass": "^9.0.0",
     "npm-run-all": "^4.1.5",
-    "postcss": "^8.4.49",
-    "postcss-cli": "^11.0.0",
+    "postcss": "^8.5.6",
+    "postcss-cli": "^11.0.1",
     "postcss-focus-within": "^9.0.1",
     "rtlcss": "^4.3.0"
   },

src/wp-content/themes/twentynineteen/package.json

@@ -22,12 +22,12 @@
 		"npm": ">=9.8.1"
 	},
 	"devDependencies": {
-		"@wordpress/browserslist-config": "^6.14.0",
-		"@wordpress/scripts": "^30.7.0",
-		"autoprefixer": "^10.4.20",
-		"concurrently": "^9.1.0",
-		"postcss": "^8.4.49",
-		"postcss-cli": "^11.0.0",
+		"@wordpress/browserslist-config": "^6.34.0",
+		"@wordpress/scripts": "^30.27.0",
+		"autoprefixer": "^10.4.22",
+		"concurrently": "^9.2.1",
+		"postcss": "^8.5.6",
+		"postcss-cli": "^11.0.1",
 		"rtlcss": "^4.3.0",
 		"stylelint-a11y": "^1.2.3"
 	},