Merge rust-bitcoin#4321: hashes: update serde dependency to match workspace

d878e5b chore(hashes): update serde dependency to workspace (Nick Johnson)

Pull request description:

  Update serde from 1.0 to 1.0.103 to align with versions used in other workspace crates. This makes the dependency constraint match reality since it was almost always implicitly raised by the other crates.

  I ran the `update-lock-files`, but no changes, which makes sense since other crates in the workspace bumped the version.

  A bit more info in rust-bitcoin#4313 (comment) with talk about minimal version testing.

ACKs for top commit:
  tcharding:
    ACK d878e5b
  apoelstra:
    ACK d878e5b; successfully ran local tests

Tree-SHA512: 3fe3eaddb58c54ac809f025e3a95f02c4c15f6209a3d17c9262923bdcbf8a094975d150c76e85de25a68e6e7574aa7e3fe40d4707bd4d159bd8cc97f36be0ee9

Author: apoelstra

hashes/Cargo.toml

@@ -24,7 +24,7 @@ small-hash = []
 [dependencies]
 internals = { package = "bitcoin-internals", path = "../internals" }
 hex = { package = "hex-conservative", version = "0.3.0", default-features = false, optional = true }
-serde = { version = "1.0", default-features = false, optional = true }
+serde = { version = "1.0.103", default-features = false, optional = true }
 
 [dev-dependencies]
 serde_test = "1.0"