bump up app version -> 0.3

Author: Mohmn

src-tauri/tauri.conf.json

@@ -8,7 +8,7 @@
   },
   "package": {
     "productName": "smearshot",
-    "version": "0.2.1"
+    "version": "0.3.0"
   },
   "tauri": {
     "allowlist": {