removed some deps, using heap to store the current ringer (makes it more dynamic)

src/scheduler.rs

@@ -9,16 +9,16 @@ use crate::ringer::Ringer;
 use crate::types::Alarm;
 
 #[derive(Debug)]
-pub struct Scheduler<T: Ringer + 'static> {
-    ringer: Arc<Mutex<T>>,
+pub struct Scheduler {
+    ringer: Arc<Mutex<dyn Ringer>>,
     cron: Arc<Mutex<Cron<Local>>>,
     alarms: Arc<Mutex<Vec<Alarm>>>,
     db: Arc<DatabaseConnection>,
 }
 
-impl<T: Ringer> Scheduler<T> {
+impl Scheduler {
     pub fn new(
-        ringer: Arc<Mutex<T>>,
+        ringer: Arc<Mutex<dyn Ringer>>,
         cron: Arc<Mutex<Cron<Local>>>,
         db: Arc<DatabaseConnection>,
     ) -> Self {