Convert to typescript (#287)

* Convert expiring map to JS

* Conver option list to TypeScript

* Fix ESM plugin loading

This doesn’t seem to actually have any side-effects but typescript has revealed possible issues here

* Convert plugin loading to typescript

* Convert config loading to typescript

* Convert sorting code to typescript

* Convert utils to typescript

* Add types

* Convert main file to typescript

* wip

* Make package type: module

* Switch to vitest

* Update lockfile

* Run fixture tests concurrently

* Use tsup for building dts files

Can’t use it to bundle just yet

* Bump test timeout

* Use Node 18 in CI

* Use Node v22 in CI

Worth seeing if it makes things faster

* Remove expired data from maps to prevent memory leaks

* Update comments

* Remove comments

Probably isn’t any reason for this actually

* Add better types to `prefixCandidate`

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ concurrency:
 env:
   CI: true
   CACHE_PREFIX: stable
-  NODE_VERSION: 16
+  NODE_VERSION: 22
 
 jobs:
   build:

build.mjs

@@ -1,6 +1,6 @@
-import fs from 'fs'
-import path from 'path'
-import { fileURLToPath } from 'url'
+import * as fs from 'node:fs'
+import * as path from 'node:path'
+import { fileURLToPath } from 'node:url'
 import esbuild from 'esbuild'
 
 /**
@@ -62,23 +62,6 @@ function patchCjsInterop() {
   }
 }
 
-/**
- * @returns {import('esbuild').Plugin}
- */
-function copyTypes() {
-  return {
-    name: 'copy-types',
-    setup(build) {
-      build.onEnd(() =>
-        fs.promises.copyFile(
-          path.resolve(__dirname, './src/index.d.ts'),
-          path.resolve(__dirname, './dist/index.d.ts'),
-        ),
-      )
-    },
-  }
-}
-
 const __dirname = path.dirname(fileURLToPath(import.meta.url))
 
 let context = await esbuild.context({
@@ -90,7 +73,7 @@ let context = await esbuild.context({
   entryPoints: [path.resolve(__dirname, './src/index.js')],
   outfile: path.resolve(__dirname, './dist/index.mjs'),
   format: 'esm',
-  plugins: [patchRecast(), patchCjsInterop(), copyTypes()],
+  plugins: [patchRecast(), patchCjsInterop()],
 })
 
 await context.rebuild()