can-dbc 2.2.1

A parser for the DBC format. The DBC format is used to exchange CAN network data.
Documentation
# Change Log
## [2.0.0]https://github.com/marcelbuesing/can-dbc/tree/2.0.0 (2019-04-09)
- Change CAN message id type from `u64` to `u32`.
- Update dependencies

## [1.1.0]https://github.com/marcelbuesing/can-dbc/tree/1.1.0 (2019-01-18)
- Add optional feature `with-serde` and derive Serialize for structs and enums.

## [1.0.1]https://github.com/marcelbuesing/can-dbc/tree/1.0.1 (2019-01-15)

### dbcc
- Add first version of dbc to rust compiler

### can-dbc
- Fix plain attribute definition
- Replace singlespace with multispace seperators (less strict)
- Allow multiple signal groups in DBC document
- Accept signal-less messages
- Accept lists in message transmitters
- Lists may now be empty