Update rust edition & clippy fixes

Cargo.toml

@@ -2,7 +2,7 @@
 name = "neovide"
 version = "0.9.0"
 authors = ["keith <keith@the-simmons.net>"]
-edition = "2018"
+edition = "2021"
 build = "build.rs"
 description = "Neovide: No Nonsense Neovim Gui"
 repository = "https://github.com/neovide/neovide"

neovide-derive/Cargo.toml

@@ -1,11 +1,11 @@
 [package]
 name = "neovide-derive"
 version = "0.1.0"
-edition = "2018"
+edition = "2021"
 
 [lib]
 proc-macro = true
 
 [dependencies]
 syn = "1.0"
-quote = "1.0"
+quote = "1.0"

src/bridge/setup.rs

@@ -53,7 +53,7 @@ pub async fn setup_neovide_remote_clipboard(nvim: &Neovim<TxWrapper>, neovide_ch
     nvim.set_var("neovide_channel_id", Value::from(neovide_channel))
         .await
         .ok();
-    nvim.execute_lua(&REGISTER_CLIPBOARD_PROVIDER_LUA, vec![])
+    nvim.execute_lua(REGISTER_CLIPBOARD_PROVIDER_LUA, vec![])
         .await
         .ok();
 }

src/settings/window_geometry.rs

@@ -86,14 +86,14 @@ pub fn save_window_geometry(
                 size: {
                     window_settings
                         .remember_window_size
-                        .then(|| grid_size)
+                        .then_some(grid_size)
                         .flatten()
                         .unwrap_or(DEFAULT_WINDOW_GEOMETRY)
                 },
                 position: {
                     window_settings
                         .remember_window_position
-                        .then(|| position)
+                        .then_some(position)
                         .flatten()
                         .unwrap_or_default()
                 },