Release [0.2.0] - 2022-06-16

bug fixes
- Typo in prometheus HELP for repository sizes

documentation
- Include top-nth documentation and example

features
- Add git cliff support for changelog
- Rename prometheus gauges to be more generic
- Provide top nth gauges
- Provide top 10 package and build artifacts sizes gauge
- Externalise top_nth count
- Provide top 10 repository size gauge

miscellaneous tasks
- Update clap and tokio dependencies
- Remove redundant dependency prettytable-rs
- Update graphql gitlab schema to 14.10

refactor
- Avoid code duplication while collecting repository metrics
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