Vendor dependencies for 0.3.0 release

vendor/pin-project/examples/pinned_drop.rs

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+// See ./pinned_drop-expanded.rs for generated code.
+
+#![allow(dead_code)]
+
+use std::pin::Pin;
+
+use pin_project::{pin_project, pinned_drop};
+
+#[pin_project(PinnedDrop)]
+pub struct Struct<'a, T> {
+    was_dropped: &'a mut bool,
+    #[pin]
+    field: T,
+}
+
+#[pinned_drop]
+impl<T> PinnedDrop for Struct<'_, T> {
+    fn drop(self: Pin<&mut Self>) {
+        **self.project().was_dropped = true;
+    }
+}
+
+fn main() {}