Added a new command (npm run test-performance) that shows that topiarist is currently ~25 times slower than using typeof and instanceof directly for the most common use case -- verifiying argument types.
Optimized the most common use-case likely with Topiarist (verifying arguments using isA()) so that it's now ~2.5 times slower than doing the same check manually, rather than being ~25 times slower, as was the case before. To achive this I did have to relax the argument checking performed, but this actuallly resulted in the browser throwing a clearer error message than what Topiarist was producing anyway.