update icon, build for linux - ready for v0.6 release

Author: LesserChance

assets/icon.png

@@ -19,6 +19,9 @@
     },
     "mac": {
       "category": "public.app-category.music"
+    },
+    "linux": {
+      "target": "tar.gz"
     }
   },
   "resolutions": {
@@ -55,7 +58,7 @@
   },
   "scripts": {
     "preelectron-pack": "yarn run build",
-    "electron-pack": "electron-builder build -m -w -c.extraMetadata.main=build/electron.js",
+    "electron-pack": "electron-builder build -l -m -w -c.extraMetadata.main=build/electron.js",
     "electron-dev": "concurrently \"BROWSER=none yarn start\" \"wait-on http://localhost:3000 && electron .\"",
     "postinstall": "electron-builder install-app-deps",
     "build-css": "node-sass-chokidar src/ -o src/",