bump to `v3.0.1`

bump to `v0.3.0`

- update Cargo.toml.
- update dependencies.

update dependencies, bump version

- bump to 2021 edition.
- bump dependencies.
- fix most clippy warnings.
- refactor modules.
- rustfmt.

update dependencies, bump version

- bump to 2021 edition.
- bump dependencies.
- fix most clippy warnings.
- refactor modules.
- rustfmt.

version bump

pub default_path field; fix #1; bump version

make fields public; minor refactoring; version bump

- make fields public for: Instrument, Group and Region.
- add doc comments for the fields.
- make the error module public.
- create custom Result type.
- rename guitar example to parse.
- version bump

update readme; add LoC badge, bump version

v0.1.2

separate dev-dependencies

rustfmt; +exports; -dep; bump

- format code with rustfmt
- add some additionaly type exports
- remove unneeded dependency
- bump version