Updated the files.

my-app/node_modules/@babel/helpers/scripts/generate-helpers.js

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+/* eslint-disable import/no-extraneous-dependencies */
+import fs from "fs";
+import { join } from "path";
+import { URL, fileURLToPath } from "url";
+import { minify } from "terser";
+import { transformSync } from "@babel/core";
+import presetTypescript from "@babel/preset-typescript";
+import { gzipSync } from "zlib";
+
+const HELPERS_FOLDER = new URL("../src/helpers", import.meta.url);
+const IGNORED_FILES = new Set(["package.json"]);
+
+export default async function generateHelpers() {
+  let output = `/*
+ * This file is auto-generated! Do not modify it directly.
+ * To re-generate run 'yarn gulp generate-runtime-helpers'
+ */
+
+import template from "@babel/template";
+
+function helper(minVersion: string, source: string) {
+  return Object.freeze({
+    minVersion,
+    ast: () => template.program.ast(source, { preserveComments: true }),
+  })
+}
+
+export default Object.freeze({
+`;
+
+  for (const file of (await fs.promises.readdir(HELPERS_FOLDER)).sort()) {
+    if (IGNORED_FILES.has(file)) continue;
+    if (file.startsWith(".")) continue; // ignore e.g. vim swap files
+
+    const [helperName] = file.split(".");
+
+    const isTs = file.endsWith(".ts");
+
+    const filePath = join(fileURLToPath(HELPERS_FOLDER), file);
+    if (!file.endsWith(".js") && !isTs) {
+      console.error("ignoring", filePath);
+      continue;
+    }
+
+    let code = await fs.promises.readFile(filePath, "utf8");
+    const minVersionMatch = code.match(
+      /^\s*\/\*\s*@minVersion\s+(?<minVersion>\S+)\s*\*\/\s*$/m
+    );
+    if (!minVersionMatch) {
+      throw new Error(`@minVersion number missing in ${filePath}`);
+    }
+    const { minVersion } = minVersionMatch.groups;
+
+    const mangleFns = code.includes("@mangleFns");
+    const noMangleFns = [];
+
+    code = transformSync(code, {
+      configFile: false,
+      babelrc: false,
+      filename: filePath,
+      presets: [
+        [
+          presetTypescript,
+          {
+            onlyRemoveTypeImports: true,
+            optimizeConstEnums: true,
+          },
+        ],
+      ],
+      plugins: [
+        /**
+         * @type {import("@babel/core").PluginObj}
+         */
+        {
+          visitor: {
+            ImportDeclaration(path) {
+              const source = path.node.source;
+              source.value = source.value
+                .replace(/\.ts$/, "")
+                .replace(/^\.\//, "");
+            },
+            FunctionDeclaration(path) {
+              if (
+                mangleFns &&
+                path.node.leadingComments?.find(c =>
+                  c.value.includes("@no-mangle")
+                )
+              ) {
+                const name = path.node.id.name;
+                if (name) noMangleFns.push(name);
+              }
+            },
+          },
+        },
+      ],
+    }).code;
+    code = (
+      await minify(code, {
+        ecma: 5,
+        mangle: {
+          keep_fnames: mangleFns ? new RegExp(noMangleFns.join("|")) : true,
+        },
+        // The _typeof helper has a custom directive that we must keep
+        compress: { directives: false, passes: 10 },
+      })
+    ).code;
+
+    output += `\
+  // size: ${code.length}, gzip size: ${gzipSync(code).length}
+  ${JSON.stringify(helperName)}: helper(
+    ${JSON.stringify(minVersion)},
+    ${JSON.stringify(code)},
+  ),
+`;
+  }
+
+  output += "});";
+  return output;
+}

my-app/node_modules/@babel/helpers/scripts/generate-regenerator-runtime.js

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+/* eslint-disable import/no-extraneous-dependencies */
+
+import fs from "fs";
+import { createRequire } from "module";
+
+const [parse, generate] = await Promise.all([
+  import("@babel/parser").then(ns => ns.parse),
+  import("@babel/generator").then(ns => ns.default.default || ns.default),
+]).catch(error => {
+  console.error(error);
+  throw new Error(
+    "Before running generate-helpers.js you must compile @babel/parser and @babel/generator.",
+    { cause: error }
+  );
+});
+
+const REGENERATOR_RUNTIME_IN_FILE = fs.readFileSync(
+  createRequire(import.meta.url).resolve("regenerator-runtime"),
+  "utf8"
+);
+
+const MIN_VERSION = "7.18.0";
+
+const HEADER = `/* @minVersion ${MIN_VERSION} */
+/*
+ * This file is auto-generated! Do not modify it directly.
+ * To re-generate, update the regenerator-runtime dependency of
+ * @babel/helpers and run 'yarn gulp generate-runtime-helpers'.
+ */
+
+/* eslint-disable */
+`;
+
+const COPYRIGHT = `/*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/facebook/regenerator/blob/main/LICENSE */`;
+
+export default function generateRegeneratorRuntimeHelper() {
+  const ast = parse(REGENERATOR_RUNTIME_IN_FILE, { sourceType: "script" });
+
+  const factoryFunction = ast.program.body[0].declarations[0].init.callee;
+  factoryFunction.type = "FunctionDeclaration";
+  factoryFunction.id = { type: "Identifier", name: "_regeneratorRuntime" };
+  factoryFunction.params = [];
+  factoryFunction.body.body.unshift(
+    ...stmts(`
+      ${COPYRIGHT}
+      _regeneratorRuntime = function () { return exports; };
+      var exports = {};
+    `)
+  );
+
+  const { code } = generate({
+    type: "ExportDefaultDeclaration",
+    declaration: factoryFunction,
+  });
+
+  return HEADER + code;
+}
+
+function stmts(code) {
+  return parse(`function _() { ${code} }`, {
+    sourceType: "script",
+  }).program.body[0].body.body;
+}

my-app/node_modules/@babel/helpers/scripts/package.json

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+{ "type": "module" }