Replace punycode dependency with string iteration

The spread operator has been available since Node 5.0.0, and iterates
strings over their code points (not code units), as expected here.
There’s no need to use the punycode library for this.

Signed-off-by: Anders Kaseorg <[email protected]>

Author: andersk

package-lock.json

@@ -68,7 +68,6 @@
     "commander": "^12.1.0",
     "debug": "^4.3.6",
     "glob": "^11.0.0",
-    "punycode": "^2.3.1",
     "sax": "^1.4.1",
     "svg-pathdata": "^7.0.0",
     "transformation-matrix-js": "^2.7.6",

package.json

@@ -1,4 +1,3 @@
-import punycode from 'punycode/punycode.js';
 import { Transform } from 'stream';
 import Sax from 'sax';
 import { SVGPathData } from 'svg-pathdata';
@@ -562,9 +561,11 @@ export class SVGIcons2SVGFontStream extends Transform {
       delete glyph.paths;
       const d = glyphPath.round(this._options.round).encode();
       glyph.unicode.forEach((unicode, i) => {
-        const unicodeStr = punycode.ucs2
-          .decode(unicode)
-          .map((point) => '&#x' + point.toString(16).toUpperCase() + ';')
+        const unicodeStr = [...unicode]
+          .map(
+            (char) =>
+              '&#x' + char.codePointAt(0)!.toString(16).toUpperCase() + ';',
+          )
           .join('');
 
         this.push(

src/index.ts

@@ -4,7 +4,6 @@ import { Readable } from 'node:stream';
 import fs from 'node:fs';
 import { mkdir } from 'node:fs/promises';
 import { join } from 'node:path';
-import punycode from 'punycode/punycode.js';
 
 import { SVGIcons2SVGFontStream } from '../index.js';
 import { SVGIconsDirStream, type SVGIconStream } from '../iconsdir.js';
@@ -572,7 +571,7 @@ describe('Passing code points', () => {
 
     svgIconStream.metadata = {
       name: 'account',
-      unicode: [punycode.ucs2.encode([0x1f63a])],
+      unicode: ['\u{1f63a}'],
     };
 
     const promise = bufferStream(svgFontStream);