Release v0.3.0.
* Changes in 0.3.0
** New functionality
** Notable fixes
- `sq-git policy export` now requires either `--name` or `--all`.
** Notable changes
- The help output has been improved. Like `sq`, the global options
are only showed at the top-level. When showing a subcommand's
usage, any examples are also shown.
- The subcommand structure has been aligned with `sq`. In
particular, the help subcommand has been disabled for
non-top-level subcommands.
- Change `--policy-file` from a global to a local argument that is
only available for commands that actually use it.