serde_json only as test

Cargo.toml

@@ -28,7 +28,6 @@ __doctest = []
 
 [dependencies]
 serde = { version = "1.0.99", default-features = false, optional = true }
-serde_json = { version = "1" }
 pure-rust-locales = { version = "0.5.2", optional = true }
 criterion = { version = "0.4.0", optional = true }
 rkyv = {version = "0.7", optional = true}
@@ -45,6 +44,7 @@ windows-sys = { version = "0.48.0", features = ["Win32_System_Time", "Win32_Foun
 iana-time-zone = { version = "0.1.45", optional = true, features = ["fallback"] }
 
 [dev-dependencies]
+serde_json = { version = "1" }
 serde_derive = { version = "1", default-features = false }
 bincode = { version = "1.3.0" }
 num-iter = { version = "0.1.35", default-features = false }

src/error.rs

@@ -10,17 +10,24 @@ use std::time::SystemTimeError;
 pub enum Error {
     /// Invalid date
     InvalidDate,
+
     /// Invalid time
     InvalidTime,
+
     /// Invalid date time
     InvalidDateTime,
+
     /// Invalid time zone
     InvalidTimeZone,
+
     /// Ambigious date
     AmbiguousDate,
+
     /// Missing date
     #[cfg(all(unix, feature = "clock"))]
     MissingDate,
+
+    /// Time before the the given epoch
     #[cfg(all(windows, feature = "clock"))]
     SystemTimeBeforeEpoch,
 
@@ -227,6 +234,7 @@ impl From<core::str::Utf8Error> for Error {
     }
 }
 
+#[cfg(test)]
 #[cfg(feature = "serde")]
 #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
 impl From<serde_json::Error> for Error {