chore: generate shippedProposals from corejs3 compat data

package.json

@@ -3,7 +3,8 @@
   "private": true,
   "license": "MIT",
   "scripts": {
-    "build": "yarn build-es-shims-data && gulp build && gulp bundle",
+    "build": "yarn build-es-shims-data && yarn build-corejs3-shipped-proposals && gulp build && gulp bundle",
+    "build-corejs3-shipped-proposals": "node ./scripts/build-corejs3-shipped-proposal.mjs",
     "build-es-shims-data": "./scripts/download-compat-table.sh && node ./scripts/build-es-shims-data",
     "clean": "rimraf packages/*/lib packages/*/esm",
     "clean-all": "yarn clean && rimraf packages/*/node_modules node_modules",

packages/babel-plugin-polyfill-corejs3/src/shipped-proposals.js

@@ -1,6 +1,8 @@
 // @flow
+// This file is automatically generated by scripts/build-corejs3-shipped-proposals.js
 
 export default new Set<string>([
-  "esnext.global-this",
-  "esnext.string.match-all",
+  "esnext.array.at",
+  "esnext.object.has-own",
+  "esnext.typed-array.at",
 ]);

scripts/build-corejs3-shipped-proposals.mjs

@@ -0,0 +1,26 @@
+import compatData from "../packages/babel-plugin-polyfill-corejs3/core-js-compat/data.js";
+import fs from "node:fs";
+
+const path = new URL(
+  "../packages/babel-plugin-polyfill-corejs3/src/shipped-proposals.js",
+  import.meta.url
+);
+
+const template = features => `// @flow
+// This file is automatically generated by scripts/build-corejs3-shipped-proposals.js
+
+export default new Set<string>([
+${features.map(f => `  "${f}",\n`).join("")}]);
+`;
+
+const shippedProposals = [];
+
+for (const feature in compatData) {
+  if (!feature.startsWith("esnext.")) continue;
+  const esName = "es." + feature.slice(7);
+  if (esName in compatData) continue;
+  if (Object.keys(compatData[feature]).length === 0) continue;
+  shippedProposals.push(feature);
+}
+
+fs.writeFileSync(path, template(shippedProposals));