Bump to v2.2.1

Author: airsquared

src/main/java/com/airsquared/blobsaver/Main.java

@@ -35,7 +35,7 @@
 
 public class Main {
 
-    static final String appVersion = "v2.2.1-beta";
+    static final String appVersion = "v2.2.1";
     static final Preferences appPrefs = Preferences.userRoot().node("airsquared/blobsaver/prefs");
     private static final String appID = "com.airsquared.blobsaver";
     static Stage primaryStage;