feat: recognize mts files (#128)

Resolve `.mts` files as TypeScript files.

Co-authored-by: Ethan Marsh <ethan@ethans-mbp.lan>

Author: ecmarsh

src/index.ts

@@ -24,7 +24,7 @@ type SWCOptions = WithRequiredProperty<JscConfig, 'parser' | 'transform'>
 export default createUnplugin<Options | undefined, false>(
   ({ tsconfigFile, minify, include, exclude, ...options } = {}) => {
     const filter = createFilter(
-      include || /\.[jt]sx?$/,
+      include || /\.m?[jt]sx?$/,
       exclude || /node_modules/,
     )
 
@@ -44,7 +44,7 @@ export default createUnplugin<Options | undefined, false>(
               tsconfigFile === true ? undefined : tsconfigFile,
             )?.data?.compilerOptions || {}
 
-        const isTs = /\.tsx?$/.test(id)
+        const isTs = /\.m?tsx?$/.test(id)
 
         let jsc: SWCOptions = {
           parser: {

src/resolve.ts

@@ -2,7 +2,7 @@ import fs from 'fs'
 import path from 'path'
 import { pathExists } from 'path-exists'
 
-const RESOLVE_EXTENSIONS = ['.tsx', '.ts', '.jsx', '.js', '.mjs', '.cjs']
+const RESOLVE_EXTENSIONS = ['.tsx', '.ts', '.mts', '.jsx', '.js', '.mjs', '.cjs']
 
 const resolveFile = async(resolved: string, index = false) => {
   for (const ext of RESOLVE_EXTENSIONS) {