Dependencies | Update to TS 5.9.3, ESLint 9.39.1, Prettier 3.6.2 (#2214)

## What are you changing?

- Update Typescript to 5.9.3 across all projects
- Update to ESLint 9.39.1 across all projects
- Update to Prettier 3.6.2 across all projects
- Update from pnpm v8 -> v10
- Upgrade ESLint plugins to latest versions where possible
- Use `eslint-plugin-storybook` in `@guardian/eslintconfig`
- Fix any issues that arise as a result of the upgrades

Author: coldlink

.changeset/clever-boats-think.md

@@ -0,0 +1,5 @@
+---
+'@guardian/browserslist-config': major
+---
+
+- Peer Dependency: Update `tslib` to `2.8.1`

.changeset/four-suns-fold.md

@@ -0,0 +1,6 @@
+---
+'@guardian/prettier': major
+---
+
+- Peer Dependency: Update `prettier` to `3.6.2`
+- Peer Dependency: Update `tslib` to `2.8.1`

.changeset/little-papers-attend.md

@@ -0,0 +1,15 @@
+---
+'@guardian/ab-react': major
+'@guardian/identity-auth': major
+'@guardian/identity-auth-frontend': major
+'@guardian/newsletter-types': major
+'@guardian/core-web-vitals': major
+'@guardian/react-crossword': major
+'@guardian/ab-core': major
+'@guardian/source': major
+'@guardian/source-development-kitchen': major
+'@guardian/libs': major
+---
+
+- Peer Dependency: Update `typescript` to `5.9.3`
+- Peer Dependency: Update `tslib` to `2.8.1`

.changeset/two-mugs-relax.md

@@ -0,0 +1,18 @@
+---
+'@guardian/eslint-config': major
+---
+
+- Peer Dependency: Update `eslint` to `9.39.1`
+- Add storybook configuration from `eslint-plugin-storybook` to config
+
+```ts
+import guardian from '@guardian/eslint-config';
+
+const config = [
+	// other eslint configuration
+
+	...guardian.configs.storybook,
+];
+
+export default config;
+```

apps/github-pages/package.json

@@ -15,7 +15,7 @@
 		"@guardian/libs": "workspace:*",
 		"astro": "5.15.1",
 		"svelte": "5.43.2",
-		"typescript": "5.5.2",
+		"typescript": "5.9.3",
 		"wireit": "0.14.12"
 	},
 	"wireit": {

apps/storybooks/package.json

@@ -9,14 +9,14 @@
 	"devDependencies": {
 		"@emotion/react": "11.11.4",
 		"@guardian/source": "workspace:*",
-		"@storybook/addon-a11y": "10.0.5",
-		"@storybook/addon-docs": "10.0.5",
-		"@storybook/addon-links": "10.0.5",
-		"@storybook/react-vite": "10.0.5",
+		"@storybook/addon-a11y": "10.0.6",
+		"@storybook/addon-docs": "10.0.6",
+		"@storybook/addon-links": "10.0.6",
+		"@storybook/react-vite": "10.0.6",
 		"@types/react": "18.2.79",
 		"react": "18.2.0",
 		"react-dom": "18.2.0",
-		"storybook": "10.0.5",
+		"storybook": "10.0.6",
 		"wireit": "0.14.12"
 	},
 	"wireit": {

libs/@guardian/ab-core/CHANGELOG.md

@@ -57,7 +57,6 @@
   In order to update your code to work identically, you must now provide the
   following keys to the constructor’s argument. They are listed here along with
   the fallbacks previously applied:
-
   - `serverSideTests` → `{}`
   - `errorReporter` → `() => undefined`
   - `ophanRecord` → `() => undefined`

libs/@guardian/ab-core/eslint.config.js

@@ -1,6 +1,7 @@
 import guardian from '@guardian/eslint-config';
 
-export default [
+/** @type {import('eslint').Linter.Config} */
+const config = [
 	...guardian.configs.recommended,
 	...guardian.configs.jest,
 	{
@@ -11,3 +12,5 @@ export default [
 		],
 	},
 ];
+
+export default config;

libs/@guardian/ab-core/package.json

@@ -32,18 +32,18 @@
 	"devDependencies": {
 		"@guardian/eslint-config": "workspace:*",
 		"@types/jest": "30.0.0",
-		"eslint": "9.19.0",
+		"eslint": "9.39.1",
 		"jest": "30.0.5",
 		"jest-environment-jsdom": "30.2.0",
 		"rollup": "4.52.5",
 		"ts-jest": "29.4.0",
-		"tslib": "2.6.2",
-		"typescript": "5.5.2",
+		"tslib": "2.8.1",
+		"typescript": "5.9.3",
 		"wireit": "0.14.12"
 	},
 	"peerDependencies": {
-		"tslib": "^2.6.2",
-		"typescript": "~5.5.2"
+		"tslib": "^2.8.1",
+		"typescript": "~5.9.3"
 	},
 	"peerDependenciesMeta": {
 		"typescript": {

libs/@guardian/ab-react/eslint.config.js

@@ -1,6 +1,7 @@
 import guardian from '@guardian/eslint-config';
 
-export default [
+/** @type {import('eslint').Linter.Config} */
+const config = [
 	...guardian.configs.recommended,
 	...guardian.configs.jest,
 	...guardian.configs.react,
@@ -12,3 +13,5 @@ export default [
 		],
 	},
 ];
+
+export default config;