Handle NULL values in UpsertQuery functions for MySQL and SQLite

Add a workaround for wait_timeout causing the mysql connection to be …

…closed, thanks to Redox for reporting it

#major bump version because of the changes we done in rust side

Fix trace not working for *Sync functions

Fixes #2, this was because other fields inside EMPTY_OPS were not res…

…et before reusing it

Remove atomic_enum from dependencies, as it slows down compiling by a…

… lot for whatever reason

trace is now pushed to on_error as a second param

Use global `NULL` instead of a unique table, to make it easier

Handle raw queries correctly in sqlite

Update sqlite to use `sql.QueryTyped` and remove some duplicated code