Upgrade the version of Terser to make reduce_funcs work well

package.json

@@ -30,6 +30,6 @@
     "npm-run-all": "^4.1.5",
     "ospec": "4.2.1",
     "rimraf": "^6.0.1",
-    "terser": "^4.3.4"
+    "terser": "^5.7.2"
   }
 }

scripts/bundler.js

@@ -42,8 +42,8 @@ async function build() {
 		return
 	}
 	console.log("minifying...")
-	// Terser's  “compress” option seems to degrade performance. So, disable it.
-	const minified = Terser.minify(original, {compress: false, mangle: true})
+	// Terser's "reduce_funcs" option seems to degrade performance. So, disable it.
+	const minified = await Terser.minify(original, {compress: {reduce_funcs: false}, mangle: true})
 	if (minified.error) throw new Error(minified.error)
 	await writeFile(params.output, minified.code, "utf-8")
 	const originalSize = Buffer.byteLength(original, "utf-8")

scripts/minify-stream.js

@@ -35,7 +35,7 @@ async function minify() {
 	const input = path.resolve(__dirname, "../stream/stream.js")
 	const output = path.resolve(__dirname, "../stream/stream.min.js")
 	const original = await fs.readFile(input, "utf-8")
-	const minified = Terser.minify(original)
+	const minified = await Terser.minify(original)
 	if (minified.error) throw new Error(minified.error)
 	await fs.writeFile(output, minified.code, "utf-8")
 	const originalSize = Buffer.byteLength(original, "utf-8")