Optimize Rust dependencies with selective features and update to latest versions

- Disable default features for all dependencies to reduce bloat
- Enable only required features (std, alloc, rust_backend)
- Update chrono 0.4.42 -> 0.4.43
- Update flate2 1.1.5 -> 1.1.8
- Pin exact versions for reproducible builds
- All 184 tests pass

Author: austoonz

lib/Cargo.lock

@@ -8,15 +8,15 @@ name = "convert_core"
 crate-type = ["cdylib"]
 
 [dependencies]
-base64 = "0.22"
-sha2 = "0.10"
-sha1 = "0.10"
-md-5 = "0.10"
-hmac = "0.12"
-flate2 = "1.0"
-percent-encoding = "2.3"
-chrono = "0.4"
+base64 = { version = "0.22.1", default-features = false, features = ["std"] }
+sha2 = { version = "0.10.9", default-features = false }
+sha1 = { version = "0.10.6", default-features = false }
+md-5 = { version = "0.10.6", default-features = false }
+hmac = { version = "0.12.1", default-features = false }
+flate2 = { version = "1.1.8", default-features = false, features = ["rust_backend"] }
+percent-encoding = { version = "2.3.2", default-features = false, features = ["alloc"] }
+chrono = { version = "0.4.43", default-features = false, features = ["std"] }
 
 [dev-dependencies]
-criterion = "0.5"
-proptest = "1.4"
+criterion = "0.5.1"
+proptest = "1.9.0"