docs: update documentation

.changes/rust-edition-2021.md

@@ -0,0 +1,5 @@
+---
+"win7-notifications": patch
+---
+
+Migrate to rust edition 2021.

README.md

@@ -6,7 +6,7 @@
 Send Windows 10 styled notifications on Windows 7.
 
 #### Note:
-This crate requires a win32 event loop to be running, otherwise the notification will close immediately, check [examples/single.rs](examples/single.rs) which uses [tao](https://github.com/tauri-apps/tao) or you can use [winit](https://github.com/rust-windowing/winit) or just roll your own win32 event loop.
+This crate requires a win32 event loop to be running on the thread, otherwise the notification will close immediately, check [examples/single.rs](examples/single.rs) which uses [tao](https://github.com/tauri-apps/tao) or you can use [winit](https://github.com/rust-windowing/winit) or just roll your own win32 event loop.
 
 
 ### TODO:

src/lib.rs

@@ -4,6 +4,12 @@
 
 //! Send Windows 10 styled notifications on Windows 7.
 //!
+//! # Note:
+//!
+//! This crate requires a win32 event loop to be running on the thread, otherwise the notification will close immediately,
+//! it is recommended to use it with other win32 event loop crates like [tao](https://docs.rs/tao) or
+//! [winit](https://docs.rs/winit) or just roll your own win32 event loop.
+//!
 //! # Examples
 //!
 //! # Example 1: Simple Notification

src/notification.rs

@@ -114,7 +114,7 @@ impl Notification {
 
   /// Shows the Notification.
   ///
-  /// Requires an win32 event_loop to be running, otherwise the notification will close immediately.
+  /// Requires an win32 event_loop to be running on the thread, otherwise the notification will close immediately.
   pub fn show(&self) -> Result<()> {
     unsafe {
       let hinstance = LibraryLoader::GetModuleHandleW(w32f::PWSTR::default());