Bump to 0.2.2
diff --git a/src/lib.rs b/src/lib.rs
index 373f051..373174c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -20,7 +20,7 @@
 //! around preserving span information.
 
 // Proc-macro2 types in rustdoc of other crates get linked to here.
-#![doc(html_root_url = "https://docs.rs/proc-macro2/0.2.1")]
+#![doc(html_root_url = "https://docs.rs/proc-macro2/0.2.2")]
 
 #![cfg_attr(feature = "nightly", feature(proc_macro))]