fix cost model and bump version #28

Job	Run time
build (20)	2m 45s
check-version	5s
publish-meshsdk-contract	1m 15s
publish-meshsdk-cli	0s
publish-meshsdk-core	1m 10s
publish-meshsdk-common	1m 8s
publish-meshsdk-core-csl	1m 9s
publish-meshsdk-core-cst	1m 21s
publish-meshsdk-provider	1m 10s
publish-meshsdk-react	1m 25s
publish-meshsdk-transaction	1m 11s
publish-meshsdk-wallet	1m 8s
	13m 47s

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