error: impl core::error::Error (#530)

Author: baloo

src/errors.rs

@@ -74,8 +74,8 @@ pub enum Error {
     Rng,
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for Error {}
+impl core::error::Error for Error {}
+
 impl core::fmt::Display for Error {
     fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
         match self {