Allow literals inside meta item lists
diff --git a/src/lib.rs b/src/lib.rs
index a59e8b6..87bb38f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -23,7 +23,7 @@
 mod escape;
 
 mod attr;
-pub use attr::{Attribute, AttrStyle, MetaItem};
+pub use attr::{Attribute, AttrStyle, MetaItem, NestedMetaItem};
 
 mod constant;
 pub use constant::ConstExpr;