syn: enable extra-traits feature

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/macros/Cargo.toml b/macros/Cargo.toml
index 455b9008dc5a0427b95336010985bbf9065de20d..747bfa4e4e864eaa66b454e945e80189c174b1fe 100644 (file)
--- a/macros/Cargo.toml
+++ b/macros/Cargo.toml
@@ -12,7 +12,7 @@ repository="https://salsa.debian.org/iwj/hippotat"
 
 [dependencies]
 itertools = "0.10"
-syn = "1"
+syn = { version = "1", features=["extra-traits"] }
 proc-macro2 = "1"
 quote = "1"