v0.4.0b

Beta release with support for Cairo 0.10

What's Changed

• Update RELEASING.md by @martriay in #438
• Fix linter lack of package.json by @martriay in #448
• Run docs locally and add Deploy Previews through Netlify by @ericnordelo in #459
• Bump to cairo v0.10 by @andrew-fleming in #449

New Contributors

• @ericnordelo made their first contribution in #459

Full Changelog: v0.3.2...v0.4.0b