Description: Use more modern versions of babel and rollup for building package
Forwarded: https://github.com/caolan/async/issues/1992
Author: Julian Gilbey <jdg@debian.org>

--- a/support/build/compile-module.js
+++ b/support/build/compile-module.js
@@ -2,9 +2,7 @@
 
 const yargs = require('yargs');
 const fs = require('fs');
-const {transformFile} = require('babel-core');
-const pluginCJS = require('babel-plugin-transform-es2015-modules-commonjs');
-const pluginModuleExports = require('babel-plugin-add-module-exports');
+const {transformFile} = require('@babel/core');
 
 compileModule(yargs.argv, (err) => {
     if (err) throw err;
@@ -13,8 +11,8 @@
 function compileModule(options, callback) {
     const {file, output} = options;
     const plugins = [
-        pluginModuleExports,
-        pluginCJS
+        "babel-plugin-add-module-exports",
+        "@babel/plugin-transform-modules-commonjs"
     ];
 
     transformFile(file, {
--- a/support/build/aggregate-bundle.js
+++ b/support/build/aggregate-bundle.js
@@ -1,5 +1,5 @@
 const {rollup} = require('rollup');
-const nodeResolve = require('rollup-plugin-node-resolve');
+const nodeResolve = require('@rollup/plugin-node-resolve');
 
 rollup({
     input: 'build-es/index.js',
--- a/support/build/aggregate-module.js
+++ b/support/build/aggregate-module.js
@@ -1,5 +1,5 @@
 const {rollup} = require('rollup');
-const nodeResolve = require('rollup-plugin-node-resolve');
+const nodeResolve = require('@rollup/plugin-node-resolve');
 
 rollup({
     input: 'build-es/index.js',
--- a/.babelrc
+++ b/.babelrc
@@ -1,7 +1,7 @@
 {
   "plugins": [
-    "transform-es2015-modules-commonjs",
-    "syntax-async-generators"
+    "@babel/plugin-transform-modules-commonjs",
+    "@babel/plugin-syntax-async-generators"
   ],
   "env": {
     "test": {