Improve notification.js

Added:
- Block comment
- Support for additional node-notifier properties.

build/utils/notification.js

@@ -1,9 +1,29 @@
 import notifier from 'node-notifier';
 
-export default function notification({ title, message }) {
+/**
-    notifier.notify({
+ * Sends a cross-platform native notification.
-        title,
+ *
-        message,
+ * Wraps around node-notifier to assign default values.
-        icon: 'https://user-images.githubusercontent.com/4596862/54868065-c2aea200-4d5e-11e9-9ce3-e0013c15f48c.png'
+ *
-    });
+ * @param {string|object} options         - The notification options or a message.
+ * @param {string}        options.title   - The notification title.
+ * @param {string}        options.message - The notification message.
+ * @param {string}        options.icon    - The notification icon.
+ */
+export default function notification(options) {
+    if (typeof options === 'string') {
+        options = {
+            message: options
+        };
+    } else if (!options.title && !options.message) {
+        throw new TypeError(
+            'Notification expects at least a \'message\' parameter'
+        );
+    }
+
+    if (typeof options.icon === 'undefined') {
+        options.icon = 'https://user-images.githubusercontent.com/4596862/54868065-c2aea200-4d5e-11e9-9ce3-e0013c15f48c.png';
+    }
+
+    notifier.notify(options);
 };