Dollar quoted strings not handling semicolon in UPDATE statements

```sql
select $$test;test$$;
--> works

create table test(a text);

insert into test(a) values ($$test;test$$);
--> works

update test set a=$$test;test$$;
--> fails (works from the Admin UI)
```

_edit: Bug raised at sqlparse: https://github.com/andialbrecht/sqlparse/issues/763_

Reproduce the shown SELECT, INSERT, and UPDATE statements in the Crash SQL shell, then inspect how statements are split before execution and compare the behavior with sqlparse issue 763. Done means the dollar-quoted semicolon remains part of the UPDATE value and the regression is covered by an appropriate test.

Written by the indexing model from the issue text.