Make encoding support default

Users will currently experience a runtime failure if they encounter data of a
non-UTF-8 encoding. It's probably better to make encoding support opt-out,
to prevent users from running into this problem in production after
doing their testing with simple UTF-8 documents.

Opting out could yield some performance benefits and reduce binary size
but but it's something you should probably conciously decide not to use.

Author: dralley

Cargo.toml

@@ -43,7 +43,7 @@ harness = false
 path = "benches/macrobenches.rs"
 
 [features]
-default = []
+default = ["encoding"]
 
 ## Enables support for asynchronous reading from `tokio`'s IO-Traits by enabling
 ## [reading events] from types implementing [`tokio::io::AsyncBufRead`].

Changelog.md

@@ -12,6 +12,9 @@
 
 ### New Features
 
+- [#441]: Made the `encoding` feature default. If you only need support for UTF-8
+  you can opt out of it with --no-default-features.
+
 ### Bug Fixes
 
 - [#490]: Ensure that serialization of map keys always produces valid XML names.
@@ -65,6 +68,7 @@
 - [#489]: Reduced the size of the package uploaded into the crates.io by excluding
   tests, examples, and benchmarks.
 
+[#441]: https://github.com/tafia/quick-xml/pull/441
 [#481]: https://github.com/tafia/quick-xml/pull/481
 [#489]: https://github.com/tafia/quick-xml/pull/489