Drop Serde support #34
Description
As of serde_json 0.9 it provides its own stable macro_rules json! macro:
https://docs.serde.rs/serde_json/macro.json.html
Some neat things about it:
- macro_rules, works great on stable Rust
- no parens needed around expressions
- negative numbers work
- allows interpolation of map keys, not just values
- allows optional trailing commas
Unless there are some advantages of this library over that json! macro, let's drop Serde support and have this library be for rustc-serialize only.