Update serde from 1.0.176 to 1.0.185

Summary:
This release most notably removes the precompiled serde_derive:
https://github.com/serde-rs/serde/releases/tag/v1.0.184

Reviewed By: shayne-fletcher

Differential Revision: D48516549

fbshipit-source-id: 077f650094f9424982de9283d04ede59306947b0

watchman/cli/Cargo.toml

@@ -11,7 +11,7 @@ ahash = "0.8"
 anyhow = "1.0.71"
 duct = "0.13.6"
 jwalk = "0.6"
-serde = { version = "1.0.176", features = ["derive", "rc"] }
+serde = { version = "1.0.185", features = ["derive", "rc"] }
 serde_json = { version = "1.0.100", features = ["float_roundtrip", "unbounded_depth"] }
 structopt = "0.3.23"
 sysinfo = "0.26.8"