Update zwasm dependency to v0.2.0 (Stage 5 complete) #17

Job	Run time
test-linux	3m 6s
test-macos	3m 7s
cross-compile (aarch64-linux-gnu)	3m 4s
cross-compile (x86_64-linux-gnu)	2m 54s
cross-compile (x86_64-macos-none)	2m 54s
cross-compile (aarch64-macos-none)	3m 9s
	18m 14s

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