v0.3.0

• The whole crate was rewritten with new versions of proc_macro, syn and similar crates
• The crate now almost compiles on stable: the only feature we use is edition = "2018" in Cargo.toml. Apart from that, all APIs we use are already stabilized.
• Add a lot of examples and documentation
• Add keep_default_for attribute
• Fixed a bunch of bugs
• Relicensed to MIT/Apache-2 (from only MIT)

Internals

• Add compile-fail and compile-pass test suite