v2.1.0
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#### Important Changes
  - Missing functions that are part of the API are added
  - Previously existing functions that took keyword lists still will work but
    using the new Map types to provide optional data is preferred
#### Enhancements
  - Use Github Workflows to test with multiple Elixir versions, credo, dialyzer
  - Update dependencies
  - More doctests

v2.0.0
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#### First Release
  - Initial version for hex.pm with most functions for API in place