Run clippy on CI

Fixes #1402.

examples/web.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::single_match)]
+
 use winit::{
     event::{Event, WindowEvent},
     event_loop::EventLoop,
@@ -43,6 +45,7 @@ mod wasm {
     pub fn run() {
         console_log::init_with_level(log::Level::Debug).expect("error initializing logger");
 
+        #[allow(clippy::main_recursion)]
         super::main();
     }