Bump serve-static from 1.15.0 to 1.16.2 #13

Job	Run time
1155 Contracts / build / Build	9m 10s
1155 Contracts / coverage / Coverage	2m 18s
1155 Deployments / build / Build	4m 32s
Mints / build / Build	3m 10s
Mints / coverage / Coverage	1m 43s
Protocol Rewards / build / Build	2m 35s
Protocol Rewards / coverage / Coverage	3m 22s
Protocol Rewards / contract_sizes / Contract sizes	4s
Protocol Rewards / test / Test	3s
Mints / test / Test	4s
Mints / contract_sizes / Contract sizes	4s
1155 Deployments / test / Test	3s
1155 Contracts / storage_layout / Storage layout inspection	2s
1155 Contracts / contract_sizes / Contract sizes	4s
1155 Contracts / test / Test	3s
	27m 17s

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