Fixed more compile time errors

src/service/pusher/data.rs

@@ -1,4 +1,5 @@
 use ruma::{UserId, api::client::push::{set_pusher, get_pushers}};
+use crate::Result;
 
 pub trait Data {
     fn set_pusher(&self, sender: &UserId, pusher: set_pusher::v3::Pusher) -> Result<()>;
@@ -10,5 +11,5 @@ pub trait Data {
     fn get_pusher_senderkeys<'a>(
         &'a self,
         sender: &UserId,
-    ) -> impl Iterator<Item = Vec<u8>> + 'a;
+    ) -> Box<dyn Iterator<Item = Vec<u8>>>;
 }

src/service/pusher/mod.rs

@@ -1,7 +1,7 @@
 mod data;
 pub use data::Data;
 
-use crate::{services, Error, PduEvent};
+use crate::{services, Error, PduEvent, Result};
 use bytes::BytesMut;
 use ruma::{
     api::{
@@ -27,7 +27,7 @@ pub struct Service<D: Data> {
     db: D,
 }
 
-impl Service<_> {
+impl<D: Data> Service<D> {
     pub fn set_pusher(&self, sender: &UserId, pusher: set_pusher::v3::Pusher) -> Result<()> {
         self.db.set_pusher(sender, pusher)
     }