Use i64 for Model and Deck ids

[Heliozoa]

Hi,
Thanks for your work on genanki-rs.

I got an error when using a randomly generated Model id because it was too large (out of range integral type conversion attempted). The error occurred here:

genanki-rs/src/note.rs

Lines 168 to 185 in 6ddffe9

	transaction
	.execute(
	"INSERT INTO notes VALUES(?,?,?,?,?,?,?,?,?,?,?);",
	params![
	id_gen.next(), // id
	self.get_guid(), // guid
	self.model.id, // mid
	timestamp as i64, // mod
	-1, // usn
	self.format_tags(), // TODO tags
	self.format_fields(), // flds
	self.sort_field, // sfld
	0, // csum, can be ignored
	0, // flags
	"", // data
	],
	)
	.map_err(database_error)?;

I was also able to reproduce a similar error by trying to use a large Deck id. It seems like the cause is that the integer used in SQLite is an i64. Anki doesn't seem to mind negative model or deck ids, so this PR changes the ids to be i64 to avoid this kind of error. Note ids seem to be unaffected so I didn't change them.

[lquenti]

Looks great! Also fixes my problem. Please merge asap and update on crates.io

[yannickfunk]

LGTM, I will make a new crates.io release soon

[yannickfunk]

New version is out: https://crates.io/crates/genanki-rs/0.3.1