fix: pin language-tools to TypeScript 5.4

TypeScript 5.5 is causing snapshot mismatches.

BTW I also explicitly set the registry address in the `pnpm dedupe`
command, because on my local machine somehow pnpm keeps using the
default one for the command.

tests/language-tools.ts

@@ -1,27 +1,21 @@
 import { runInRepo } from '../utils.ts'
 import { RunOptions } from '../types.ts'
+import { REGISTRY_ADDRESS } from '../registry.ts'
 
 export async function test(options: RunOptions) {
 	await runInRepo({
 		...options,
 		repo: 'vuejs/language-tools',
 		branch: 'master',
-		beforeBuild: 'pnpm dedupe',
+		beforeBuild: `pnpm dedupe --registry=${REGISTRY_ADDRESS}`,
 		build: 'build',
 		test: 'test',
-		// patchFiles: {
-		// 	'package.json': (content) => {
-		// 		const pkg = JSON.parse(content)
-		// 		// As of 2024-03-19,
-		// 		// the version of TypeScript in the package.json is latest, which resolves to 5.4.2 if we dedupe it.
-		// 		// The new feature in TypeScript 5.4,
-		// 		// [Preserved Narrowing in Closures Following Last Assignments](https://devblogs.microsoft.com/typescript/announcing-typescript-5-4/#preserved-narrowing-in-closures-following-last-assignments),
-		// 		// would cause a type error at <https://github.com/vuejs/language-tools/blob/58a820281d4b4a8b2d484a7fa2a2eb73e5eb4daf/packages/language-service/lib/plugins/vue-document-drop.ts#L88>.
-		// 		// There are also other tests broken by TypeScript 5.4.
-		// 		// So we need to pin the version to ~5.3.3.
-		// 		pkg.devDependencies.typescript = '~5.3.3'
-		// 		return JSON.stringify(pkg, null, 2)
-		// 	},
-		// },
+		patchFiles: {
+			'package.json': (content) => {
+				const pkg = JSON.parse(content)
+				pkg.devDependencies.typescript = '~5.4.5'
+				return JSON.stringify(pkg, null, 2)
+			},
+		},
 	})
 }