chore: build corejs3-shipped-proposals.json from core-js-compat

packages/babel-preset-env/data/corejs3-shipped-proposals.json

@@ -0,0 +1,5 @@
+[
+  "esnext.global-this",
+  "esnext.promise.all-settled",
+  "esnext.string.match-all"
+]

packages/babel-preset-env/package.json

@@ -11,7 +11,7 @@
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-preset-env",
   "main": "lib/index.js",
   "scripts": {
-    "build-data": "./scripts/download-compat-table.sh; node ./scripts/build-data.js; node ./scripts/build-modules-support.js"
+    "build-data": "./scripts/download-compat-table.sh; node ./scripts/build-data.js; node ./scripts/build-modules-support.js; node ./scripts/build-corejs-shipped-proposals.js"
   },
   "dependencies": {
     "@babel/helper-module-imports": "^7.7.4",

packages/babel-preset-env/scripts/build-corejs-shipped-proposals.js

@@ -0,0 +1,14 @@
+const data = require("core-js-compat/data.json");
+const fs = require("fs");
+const path = require("path");
+
+const shippedProposals = Object.keys(data).filter(feature => {
+  return feature.startsWith("esnext.") && Object.keys(data[feature]).length > 0;
+});
+
+const dataPath = path.join(__dirname, "../data/corejs3-shipped-proposals.json");
+
+fs.writeFileSync(
+  dataPath,
+  JSON.stringify(shippedProposals, undefined, 2) + "\n"
+);