chore: Implement Error for InlineError

Author: Stranger6667

CHANGELOG.md

@@ -8,6 +8,7 @@
 - Option to remove "style" tags. [#11](https://github.com/Stranger6667/css-inline/issues/11)
 - `CSSInliner::compact()` constructor for producing smaller HTML output.
 - `CSSInliner.inline_to` that writes the output to a generic writer. [#24](https://github.com/Stranger6667/css-inline/issues/24)
+- Implement `Error` for `InlineError`.
 
 ### Changed
 

src/error.rs

@@ -1,5 +1,6 @@
 //! Errors that may happen during inlining.
 use cssparser::{BasicParseErrorKind, ParseError, ParseErrorKind};
+use std::error::Error;
 use std::fmt::{Display, Formatter};
 use std::{fmt, io};
 
@@ -18,6 +19,8 @@ impl From<io::Error> for InlineError {
     }
 }
 
+impl Error for InlineError {}
+
 impl Display for InlineError {
     fn fmt(&self, f: &mut Formatter) -> fmt::Result {
         match self {