proc-macro = true
[dependencies]
-synstructure = "0.10.2"
-syn = { version = "0.15.22", features = ["full"] }
-proc-macro2 = "0.4.24"
-quote = "0.6.10"
+synstructure = "0.12.1"
+syn = { version = "1", features = ["full"] }
+proc-macro2 = "1"
+quote = "1"
itertools = "0.8"