Describe the bug
If one tries to run an UPDATE statement containing FROM against SQLite3, it produces an error:

goqu: sqlite3ex dialect does not support multiple tables in UPDATE

But this isn't true as SQLite3 does support this syntax.

To Reproduce

goqu.Dialect("sqlite3").Update("tableA").
		Set(...).
		From(goqu.Dialect("sqlite3").From("tableB").Select(...).Where(...).As("b")).
		Where(...)

Expected behavior
This must be allowed.

Dialect:

• postgres
• mysql
• sqlite3