build(deps): bump serde_with from 3.16.1 to 3.21.0 in /litellm-rust

Bumps [serde_with](https://github.com/jonasbb/serde_with) from 3.16.1 to 3.21.0.
- [Release notes](https://github.com/jonasbb/serde_with/releases)
- [Commits](https://github.com/jonasbb/serde_with/compare/v3.16.1...v3.21.0)

---
updated-dependencies:
- dependency-name: serde_with
  dependency-version: 3.21.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

litellm-rust/Cargo.lock

@@ -918,6 +918,15 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc0b364ead1874514c8c2855ab558056ebfeb775653e7ae45ff72f28f8f3166c"
 
+[[package]]
+name = "bs58"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf88ba1141d185c399bee5288d850d63b8369520c1eafc32a0430b5b6c287bf4"
+dependencies = [
+ "tinyvec",
+]
+
 [[package]]
 name = "bstr"
 version = "1.13.1"
@@ -1334,12 +1343,12 @@ dependencies = [
 
 [[package]]
 name = "darling"
-version = "0.21.3"
+version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cdf337090841a411e2a7f3deb9187445851f91b309c0c0a29e05f74a00a48c0"
+checksum = "25ae13da2f202d56bd7f91c25fba009e7717a1e4a1cc98a76d844b65ae912e9d"
 dependencies = [
- "darling_core 0.21.3",
- "darling_macro 0.21.3",
+ "darling_core 0.23.0",
+ "darling_macro 0.23.0",
 ]
 
 [[package]]
@@ -1358,11 +1367,10 @@ dependencies = [
 
 [[package]]
 name = "darling_core"
-version = "0.21.3"
+version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1247195ecd7e3c85f83c8d2a366e4210d588e802133e1e355180a9870b517ea4"
+checksum = "9865a50f7c335f53564bb694ef660825eb8610e0a53d3e11bf1b0d3df31e03b0"
 dependencies = [
- "fnv",
  "ident_case",
  "proc-macro2",
  "quote",
@@ -1383,11 +1391,11 @@ dependencies = [
 
 [[package]]
 name = "darling_macro"
-version = "0.21.3"
+version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d38308df82d1080de0afee5d069fa14b0326a88c14f15c5ccda35b4a6c414c81"
+checksum = "ac3984ec7bd6cfa798e62b4a642426a5be0e68f9401cfc2a01e3fa9ea2fcdb8d"
 dependencies = [
- "darling_core 0.21.3",
+ "darling_core 0.23.0",
  "quote",
  "syn 2.0.119",
 ]
@@ -5415,11 +5423,12 @@ dependencies = [
 
 [[package]]
 name = "serde_with"
-version = "3.16.1"
+version = "3.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fa237f2807440d238e0364a218270b98f767a00d3dada77b1c53ae88940e2e7"
+checksum = "76a5c54c7310e7b8b9577c286d7e399ddd876c3e12b3ed917a8aabc4b96e9e8c"
 dependencies = [
  "base64 0.22.1",
+ "bs58",
  "chrono",
  "hex",
  "indexmap 1.9.3",
@@ -5434,11 +5443,11 @@ dependencies = [
 
 [[package]]
 name = "serde_with_macros"
-version = "3.16.1"
+version = "3.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52a8e3ca0ca629121f70ab50f95249e5a6f925cc0f6ffe8256c45b728875706c"
+checksum = "84d57bc0c8b9a17920c178daa6bb924850d54a9c97ab45194bb8c17ad66bb660"
 dependencies = [
- "darling 0.21.3",
+ "darling 0.23.0",
  "proc-macro2",
  "quote",
  "syn 2.0.119",

litellm-rust/Cargo.toml

@@ -78,7 +78,7 @@ vaultrs = { version = "=0.8.0", default-features = false, features = ["rustls"]
 rustls-native-certs = "0.8"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = { version = "1.0", features = ["float_roundtrip"] }
-serde_with = { version = "=3.16.1", default-features = false, features = ["std", "macros"] }
+serde_with = { version = "=3.21.0", default-features = false, features = ["std", "macros"] }
 sha2 = "0.10"
 subtle = "2"
 thiserror = "2.0"