matter.js

067570c0 - Prevent async reaction to sync observables (#747)

Prevent async reaction to sync observables (#747) * Prevent async reaction to sync observables Previously there was a "TODO" that warned it might be bad if this happened. Turned out it was. This adds a runtime error to prevent this. Could also probably prevent via types but will be a bit of a PITA so will wait to see if it's a significant issue. * Add missing return Also update tests to ensure proper reaction count and move assertions out of the reactor where they're logged but don't abort the run. --------- Co-authored-by: Ingo Fischer <github@fischer-ka.de>