Add Preact support

[kale-stew]

Description

This PR consolidates the Preact support introduced in #67 and tests for that work introduced in #75 for a single minor release.

Checklist:

• [x] All tests are passing
• [x] Benchmark performance has not significantly decreased
• [x] Bundle size has not been significantly impacted (but we are up to 639)
• [x] The bundle size badge has been updated to reflect the new size

[ryan-roemer]

Oh, haha, you even got the byte size bundle image too. Rock on!

🤜 🤛