Datacontract-cli

Changed
- Log to STDOUT.
- Rename `model` command parameter, `type` -> `format`.

Removed
- Remove `schema` command.

Fixed
- Fix documentation.
- Security update of x/sys.

Added
- Adapt Data Contract Specification in version 0.9.2.
- Use `models` section for `diff`/`breaking`.
- Add `model` command.
- Let `inline` print to STDOUT instead of overwriting datacontract file.
- Let `quality` write input from STDIN if present.

Added
- Basic implementation of `test` command for Soda Core.

Changed
- Change package structure to allow usage as library.

Fixed
- Fix field parsing for dbt models, affects stability of `diff`/`breaking`.

Fixed
- Fix comparing order of contracts in `diff`/`breaking`.