change icon gen to upstream

icon-gen.js

@@ -1,5 +1,5 @@
 const sharp = require('sharp');
-const icongen = require('@mifi/icon-gen');
+const icongen = require('icon-gen');
 
 const svg2png = (from, to, width, height) => sharp(from)
   .png()

package.json

@@ -39,7 +39,6 @@
   },
   "license": "GPL-2.0-only",
   "devDependencies": {
-    "@mifi/icon-gen": "^2.1.0",
     "@types/jest": "^26.0.20",
     "axios": "^0.21.2",
     "color": "^3.1.0",
@@ -106,6 +105,7 @@
     "i18next": "^19.8.5",
     "i18next-electron-language-detector": "^0.0.10",
     "i18next-fs-backend": "^1.0.1",
+    "icon-gen": "^3.0.0",
     "json5": "^2.1.3",
     "mime-types": "^2.1.14",
     "mousetrap": "^1.6.5",