Upgrade rust/crates/pin-project to 1.0.8

Test: make
Change-Id: I5d34b05966fb665ac1d6a09229743a24d6927742
diff --git a/examples/enum-default-expanded.rs b/examples/enum-default-expanded.rs
index 2153592..459ca39 100644
--- a/examples/enum-default-expanded.rs
+++ b/examples/enum-default-expanded.rs
@@ -15,7 +15,11 @@
 // ```
 
 #![allow(dead_code, unused_imports, unused_parens, unknown_lints, renamed_and_removed_lints)]
-#![allow(clippy::needless_lifetimes, clippy::just_underscores_and_digits)]
+#![allow(
+    clippy::needless_lifetimes,
+    clippy::just_underscores_and_digits,
+    clippy::used_underscore_binding
+)]
 
 use pin_project::pin_project;