Remove lifetime from the Event

Lifetimes don't work nicely when dealing with multithreaded environments
in the current design of the existing winit's event handling model, so
remove it in favor of `InnerSizeWriter` fences passed to client, so they
could try to update the size.

Fixes #1387.

src/platform_impl/orbital/event_loop.rs

@@ -308,7 +308,7 @@ impl<T: 'static> EventLoop<T> {
         event_state: &mut EventState,
         mut event_handler: F,
     ) where
-        F: FnMut(event::Event<'_, T>),
+        F: FnMut(event::Event<T>),
     {
         match event_option {
             EventOption::Key(KeyEvent {
@@ -446,11 +446,11 @@ impl<T: 'static> EventLoop<T> {
     pub fn run<F>(mut self, mut event_handler_inner: F) -> Result<(), RunLoopError>
     where
         F: 'static
-            + FnMut(event::Event<'_, T>, &event_loop::EventLoopWindowTarget<T>, &mut ControlFlow),
+            + FnMut(event::Event<T>, &event_loop::EventLoopWindowTarget<T>, &mut ControlFlow),
     {
         // Wrapper for event handler function that prevents ExitWithCode from being unset.
         let mut event_handler =
-            move |event: event::Event<'_, T>,
+            move |event: event::Event<T>,
                   window_target: &event_loop::EventLoopWindowTarget<T>,
                   control_flow: &mut ControlFlow| {
                 if let ControlFlow::ExitWithCode(code) = control_flow {