Fix CI warnings

Fallout from the new `elided_named_lifetimes` lint.

Author: Kobzol

database/src/pool.rs

@@ -12,7 +12,7 @@ pub mod sqlite;
 #[async_trait::async_trait]
 pub trait Connection: Send + Sync {
     async fn maybe_create_indices(&mut self);
-    async fn transaction(&mut self) -> Box<dyn Transaction + '_>;
+    async fn transaction<'a>(&'a mut self) -> Box<dyn Transaction + 'a>;
 
     async fn load_index(&mut self) -> Index;
 

database/src/pool/postgres.rs

@@ -553,7 +553,7 @@ where
     P: Send + Sync + PClient,
 {
     async fn maybe_create_indices(&mut self) {}
-    async fn transaction(&mut self) -> Box<dyn Transaction + '_> {
+    async fn transaction<'a>(&'a mut self) -> Box<dyn Transaction + 'a> {
         let statements = self.statements().clone();
         let tx = self.conn_mut().transaction().await.unwrap();
         Box::new(PostgresTransaction {

database/src/pool/sqlite.rs

@@ -451,7 +451,7 @@ impl Connection for SqliteConnection {
             .unwrap();
     }
 
-    async fn transaction(&mut self) -> Box<dyn Transaction + '_> {
+    async fn transaction<'a>(&'a mut self) -> Box<dyn Transaction + 'a> {
         self.raw().execute_batch("BEGIN DEFERRED").unwrap();
         Box::new(SqliteTransaction {
             conn: self,