updates TODO.md

TODO.md

@@ -4,11 +4,11 @@
 
 ## Tasks
 
-- [ ] Switch to SQLite
+- [x] Switch to SQLite
+- [ ] Close the DB correctly in any quit case (also by SIGTERM)
 - [ ] Get rid of unsigned integers
 - [ ] Check registration
 - [ ] Common functions for both DBs, only db_query should be different
-- [ ] Close the DB correctly in any quit case (also by SIGTERM)
 - [x] Auto create a database when one is missing.
 
 ## Features