icns icon no longer works as macOS platform icon (resolves #68).

index.js

@@ -193,16 +193,19 @@ function createMenu() {
 }
 
 function getPlatformIcon(filename){
-    const opSys = process.platform
-    if (opSys === 'darwin') {
-        filename = filename + '.icns'
-    } else if (opSys === 'win32') {
-        filename = filename + '.ico'
-    } else {
-        filename = filename + '.png'
+    let ext
+    switch(process.platform) {
+        case 'win32':
+            ext = 'ico'
+            break
+        case 'darwin':
+        case 'linux':
+        default:
+            ext = 'png'
+            break
     }
 
-    return path.join(__dirname, 'app', 'assets', 'images', filename)
+    return path.join(__dirname, 'app', 'assets', 'images', `${filename}.${ext}`)
 }
 
 app.on('ready', createWindow)

package-lock.json

@@ -1118,9 +1118,9 @@
       "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ="
     },
     "eslint": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-7.0.0.tgz",
-      "integrity": "sha512-qY1cwdOxMONHJfGqw52UOpZDeqXy8xmD0u8CT6jIstil72jkhURC704W8CFyTPDPllz4z4lu0Ql1+07PG/XdIg==",
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-7.1.0.tgz",
+      "integrity": "sha512-DfS3b8iHMK5z/YLSme8K5cge168I8j8o1uiVmFCgnnjxZQbCGyraF8bMl7Ju4yfBmCuxD7shOF7eqGkcuIHfsA==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",
@@ -3059,9 +3059,9 @@
       }
     },
     "tslib": {
-      "version": "1.11.2",
-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.11.2.tgz",
-      "integrity": "sha512-tTSkux6IGPnUGUd1XAZHcpu85MOkIl5zX49pO+jfsie3eP0B6pyhOlLXm3cAC6T7s+euSDDUUV+Acop5WmtkVg==",
+      "version": "1.13.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.13.0.tgz",
+      "integrity": "sha512-i/6DQjL8Xf3be4K/E6Wgpekn5Qasl1usyw++dAA35Ue5orEn65VIxOA+YvNNl9HV3qv70T7CNwjODHZrLwvd1Q==",
       "dev": true
     },
     "tunnel": {

package.json

@@ -43,7 +43,7 @@
     "cross-env": "^7.0.2",
     "electron": "^9.0.0",
     "electron-builder": "^22.6.1",
-    "eslint": "^7.0.0"
+    "eslint": "^7.1.0"
   },
   "repository": {
     "type": "git",