Build fails when rusqlite feature is disabled on non-Unix systems

[ns-ylambert]

Commit 8ea257a introduced a compile-time error on non-Unix systems.

How to reproduce (eg. on Windows):

cargo build -p libsql --no-default-features --features core

Build fails with the following error:

error[E0599]: no method named `to_str` found for type parameter `impl AsRef<Path>` in the current scope
   --> libsql-sys\src\connection.rs:287:18
    |
200 |           path: impl AsRef<Path>,
    |                 ---------------- method `to_str` not found for this type parameter
...
286 |               let path = path
    |  ________________________-
287 | |                 .to_str()
    | |                 -^^^^^^ method not found in `impl AsRef<Path>`
    | |_________________|
    |

For more information about this error, try `rustc --explain E0599`.
error: could not compile `libsql-sys` (lib) due to 1 previous error

[ns-ylambert]

This issue is fixed in PR #2048.