Fix feature guard on SqlMerkleState
This change fixes an incorrect feature guard: sql -> sqlite.
@@ -17,7 +17,7 @@ use std::collections::HashMap;
#[cfg(feature = "diesel")]
use diesel::r2d2::{ConnectionManager, Pool};
use splinter::error::InternalError;
-#[cfg(any(feature = "postgres", feature = "sql"))]
+#[cfg(any(feature = "postgres", feature = "sqlite"))]
use transact::state::merkle::sql;
use transact::{
database::Database,
