3.0.0 - version upgrades, fixes, updated tooling

[quinnmccourt]

Version 3.0.0

This version is mainly a maintenance release to get all of the tooling and required language versions up-to-date so we can begin merging more substantive fixes and iterating on functionality.

Changed

• update language support minimums to Elixir 1.12, OTP 24, and Node 18
• format code with the latest mix format settings
• replace Travis CI with GitHub Actions for CI/CD
• add .dependabot.yml config file
• remove coverage reporting
• upgrade dependencies

Fixed

• fixed test error due to JS TypeError format change

Contributors

• @quentin-bettoum

[grossvogel]

I think the only additional thing I'd like to do with this is to wire up a GH action to deploy to hex on release publication, then we can get it merged, release a major version (b/c of the language version bump) and then get the ESM PR merged