v0.2.0

• Added the traced feature flag. See here
• Rename inflate/deflate to widen/narrow
• TracedError no longer implements std::error::Error but &TracedError does
  • Can now call context/with_context directly on an std::error::Error type (no need for .traced_dyn() first)
  • No longer possible to accidentally nest TracedError's

Full Changelog: v0.1.0...v0.2.0