v2.1.0

See the full changelog and milestone

• .equal now checks for isImmutable instead of isIterable (#213 by @gugu)
• Implement reference comparison (#218 by @jakubzitny)
• Add a table of contents of available assertions to the README (#221)

Thanks to @gugu, @jakubzitny, and @jankuca for helping me get this release out! 🙂