Bump Wasm CI to 6.0.2 #658

# to view logs

Job	Run time
Wasm	2m 13s
Windows (windows-latest, debug)	5m 40s
library (15.4, ios)	14m 10s
library (15.4, macos)	10m 47s
Windows (windows-latest, release)	14m 31s
library (15.4, tvos)	14m 21s
library (15.4, watchos)	11m 24s
library (15.4, examples)	11m 33s
	1h 24m 39s

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