added Syncalicious project (#547)

* added - [Syncalicious](https://github.com/zenangst/Syncalicious) (83⭐️)- Keeping multiple macOS preferences in sync can be painful, but it shouldn't be. ![swift_icon]

* fixed missed applications file

README.md

@@ -126,6 +126,7 @@ You can see in which language an app is written. Currently there are following l
 
 ### Backup
 - [Mackup](https://github.com/lra/mackup) - Keep your application settings in sync (macOS/Linux).  ![python_icon] 
+- [Syncalicious](https://github.com/zenangst/Syncalicious) - Keeping multiple macOS preferences in sync can be painful, but it shouldn't be. ![swift_icon] 
 - [UrBackup](https://github.com/uroni/urbackup_backend) - UrBackup is Client/Server network backup for Windows, macOS and Linux. ![cpp_icon] ![c_icon] 
 - [shallow-backup](https://github.com/alichtman/shallow-backup) - Easily create lightweight documentation of installed applications, dotfiles, and more.  ![python_icon] 
 

applications.json

@@ -578,6 +578,21 @@
                 "python"
             ]
         },
+        {
+            "short_description": "Keeping multiple macOS preferences in sync can be painful, but it shouldn't be.",
+            "categories": [
+                "backup"
+            ],
+            "repo_url": "https://github.com/zenangst/Syncalicious",
+            "title": "Syncalicious",
+            "icon_url": "",
+            "screenshots": [
+            ],
+            "official_site": "",
+            "languages": [
+                "swift"
+            ]
+        },
         {
             "short_description": "Easily create lightweight documentation of installed applications, dotfiles, and more. ",
             "categories": [