update to Rollup 3

package.json

@@ -38,13 +38,13 @@
 	"homepage": "https://conduitry.dev/defiler",
 	"devDependencies": {
 		"@types/node": "=12",
-		"rollup": "^2",
+		"rollup": "^3",
 		"rollup-plugin-cheap-ts": "Conduitry/rollup-plugin-cheap-ts#semver:^1",
 		"typescript": "^4"
 	},
 	"scripts": {
-		"build": "rollup -c",
-		"dev": "rollup -cw",
+		"build": "rollup -c --bundleConfigAsCjs",
+		"dev": "rollup -cw --bundleConfigAsCjs",
 		"prepare": "npm run build"
 	}
 }

rollup.config.js

@@ -2,10 +2,21 @@ import cheap_ts from 'rollup-plugin-cheap-ts';
 
 export default {
 	input: './src/index',
-	external: name => /^[a-z]/.test(name),
+	external: (name) => /^[a-z]/.test(name),
 	plugins: [cheap_ts()],
 	output: [
-		{ file: './dist/index.cjs', format: 'cjs', sourcemap: true, interop: false, preferConst: true },
-		{ file: './dist/index.mjs', format: 'esm', sourcemap: true, preferConst: true },
+		{
+			file: './dist/index.cjs',
+			format: 'cjs',
+			sourcemap: true,
+			interop: 'esModule',
+			generatedCode: { constBindings: true },
+		},
+		{
+			file: './dist/index.mjs',
+			format: 'esm',
+			sourcemap: true,
+			generatedCode: { constBindings: true },
+		},
 	],
 };