Support for upsert

It would be cool if SQLDelight would support the upsert command: https://www.sqlite.org/lang_UPSERT.html

Right now the following sql:

upsert:
INSERT INTO stop (id, address_id, name)
VALUES (?, ?, ?) ON CONFLICT(address_id) DO UPDATE SET name=excluded.name;

will produce this error:

',' expected, got 'ON'
62    INSERT INTO stop (id, address_id, name)
63    VALUES (?, ?, ?) ON CONFLICT(address_id) DO
                       ^^

[AlecStrong]

yea definitely, my hope is that we can allow specifying the minimum version of sqlite you’ll be using which would enable newer language features

[AlecStrong]

It goes inside your database block:

sqldelight { MyDatabase { dialect = “sqlite:3.24: } }