update version to 6.8.0

Author: tibbi

app/build.gradle

@@ -15,8 +15,8 @@ android {
         applicationId "com.simplemobiletools.draw.pro"
         minSdkVersion 21
         targetSdkVersion 33
-        versionCode 72
-        versionName "6.7.0"
+        versionCode 73
+        versionName "6.8.0"
         setProperty("archivesBaseName", "draw")
         vectorDrawables.useSupportLibrary = true
     }