fix(copy): align behavior of shallow copy with object spread #26
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Follow up on #25
In real-world use, there won't be tons of symbol keys in an object, so any slowdown in performance shouldn't be a big deal.
Also, I think we might need some more test cases for this one.
Reference: how
esbuildtransforms spread syntax:https://hyrious.me/esbuild-repl/?version=0.19.10&t=const+state+%3D+%7B+count%3A+1+%7D%3B%0Aconst+newState+%3D+%7B+...state+%7D%3B&o=--target%3Des6