Forbid unsafe code (#399)

* Forbid unsafe code

- Made possible by `wgpu` 0.19: https://github.com/gfx-rs/wgpu/blob/trunk/CHANGELOG.md#safe--unified-surface-creation
- Closes #238

* Add safety dance badge

README.md

@@ -1,5 +1,6 @@
 [![Crates.io](https://img.shields.io/crates/v/pixels)](https://crates.io/crates/pixels "Crates.io version")
 [![Documentation](https://img.shields.io/docsrs/pixels)](https://docs.rs/pixels "Documentation")
+[![unsafe forbidden](https://img.shields.io/badge/unsafe-forbidden-success.svg)](https://github.com/rust-secure-code/safety-dance/)
 [![GitHub actions](https://img.shields.io/github/actions/workflow/status/parasyte/pixels/ci.yml?branch=main)](https://github.com/parasyte/pixels/actions "CI")
 [![GitHub activity](https://img.shields.io/github/last-commit/parasyte/pixels)](https://github.com/parasyte/pixels/commits "Commit activity")
 [![GitHub Sponsors](https://img.shields.io/github/sponsors/parasyte)](https://github.com/sponsors/parasyte "Sponsors")

examples/minimal-winit-android/src/lib.rs

@@ -1,3 +1,6 @@
+#![deny(clippy::all)]
+#![forbid(unsafe_code)]
+
 #[cfg(target_os = "android")]
 use winit::platform::android::activity::AndroidApp;
 

internals/pixels-mocks/src/lib.rs

@@ -1,4 +1,5 @@
 #![deny(clippy::all)]
+#![forbid(unsafe_code)]
 
 pub struct Window;
 

run-wasm/src/main.rs

@@ -1,3 +1,6 @@
+#![deny(clippy::all)]
+#![forbid(unsafe_code)]
+
 fn main() {
     let css = r#"body {
         background-color: #000;

src/lib.rs

@@ -30,6 +30,7 @@
 //! `WGPU_ADAPTER_NAME` takes precedence.
 
 #![deny(clippy::all)]
+#![forbid(unsafe_code)]
 
 pub use crate::builder::{check_texture_size, PixelsBuilder};
 pub use crate::renderers::ScalingRenderer;