Don't warn against nightly-only or-pattern lint

Author: Xanewok

src/lib.rs

@@ -2,6 +2,9 @@
 #![allow(clippy::similar_names)]
 #![allow(clippy::single_match_else)]
 #![allow(clippy::too_many_lines)]
+// Needs a nightly feature, doesn't bring that much to the table
+// FIXME: Apply Clippy lint once or-patterns are stabilized (rust-lang/rust#54883)
+#![allow(clippy::unnested_or_patterns)]
 #![deny(warnings)]
 
 extern crate rustc_hir;