Added support for casting when Codable.

[miku1958]

Although the data stored in SQLite has specified types, these are more for guidance. If an int value is stored as a string, it should be readable as an int. This is the behavior supported by SQLite.

Changes

• Use LazySequence to delay the creation of Cursor (statement.handle) and the access of Cursor.getValue to match the variable type of Codable.
• Change subscribe of Cursor to a regular method with throws to bypass the compiler error Ambiguous use of 'xxxxx' and simplify the indentation of get throws.

[miku1958]

There are some breaking changes:
Array(sqlDB.prepare(table)).first[exp]
fails because the SQL step causes the cache handle to become invalid. I haven't thought of a good solution yet, but it can be changed to
sqlDB.prepare(table).map({ $0[exp] }).first

[miku1958]

Made some changes. If someone try to use Array.init for prepare, they will get this warning and a runtime error.

[nathanfallet]

Thanks for your PR! Tell me when it's ready so I can review it and merge it (I saw you're still pushing some code)

[miku1958]

Hi @nathanfallet I just fixed the lint, it should be ready

[miku1958]

Interesting, SQLite.xcodeproj is not using the SPM.
@nathanfallet could you try again?

[nathanfallet]

@miku1958 that's because of Cocoapods I think