fix(module): remove module handling from babel and testrunner

Author: plusgut

package.json

@@ -5,7 +5,6 @@
   "directories": {
     "test": "test"
   },
-  "type": "module",
   "scripts": {
     "test": "web-test-runner"
   },

src/babel-plugin-transform-jsx.mjs src/babel-plugin-transform-jsx.jssrc/babel-plugin-transform-jsx.mjs renamed to src/babel-plugin-transform-jsx.js

@@ -1,6 +1,6 @@
-import { addNamed } from "@babel/helper-module-imports";
+const { addNamed } = require("@babel/helper-module-imports");
 
-export default function (babel) {
+module.exports = function (babel) {
   const { types: t } = babel;
 
   return {

web-test-runner.config.mjs web-test-runner.config.jsweb-test-runner.config.mjs renamed to web-test-runner.config.js

@@ -1,10 +1,10 @@
-import { fromRollup } from "@web/dev-server-rollup";
-import rollupBabel from "@rollup/plugin-babel";
-import transform from "./src/babel-plugin-transform-jsx.mjs";
+const { fromRollup } = require("@web/dev-server-rollup");
+const rollupBabel = require("@rollup/plugin-babel");
+const transform = require("./src/babel-plugin-transform-jsx");
 // note that you need to use `.default` for babel
 const babel = fromRollup(rollupBabel);
 
-export default {
+module.exports = {
   nodeResolve: true,
   files: ["test/**/*.test.tsx"],
   mimeTypes: {