build: Version bump & appimage build

desktop/src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2.0.0",
   "productName": "Drop Desktop Client",
-  "version": "0.1.0",
+  "version": "0.2.0-beta-prerelease-1",
   "identifier": "dev.drop.app",
   "build": {
     "beforeDevCommand": "yarn dev --port 1432",
@@ -23,7 +23,7 @@
   },
   "bundle": {
     "active": true,
-    "targets": ["nsis", "deb", "rpm", "dmg"],
+    "targets": ["nsis", "deb", "rpm", "dmg", "appimage"],
     "windows": {
       "nsis": {
         "installMode": "both"