Datasette-schema-versions

- Now includes the schema version of the `_internal` database, including on Datasette 1.0 alpha. [4](https://github.com/simonw/datasette-schema-versions/issues/4)

- Added an item to the global menu for the `root` user. [1](https://github.com/simonw/datasette-schema-versions/issues/1)
- Don't include `_internal`. [2](https://github.com/simonw/datasette-schema-versions/issues/2)
- Now offers HTML at `/-/schema-versions` and JSON at `/-/schema-versions.json`. [3](https://github.com/simonw/datasette-schema-versions/issues/3)

- Initial release