Merge pull request #256 from CosmWasm/update-to-0.16.0

Upgrade CosmWasm to 0.16.0

Author: webmaster128

api/testdata/hackatom.wasm

@@ -26,8 +26,8 @@ default = []
 backtraces = []
 
 [dependencies]
-cosmwasm-std = { git = "https://github.com/CosmWasm/cosmwasm", rev = "v0.16.0-rc6", features = ["staking", "stargate"] }
-cosmwasm-vm = { git = "https://github.com/CosmWasm/cosmwasm", rev = "v0.16.0-rc6", features = ["staking", "stargate"] }
+cosmwasm-std = { git = "https://github.com/CosmWasm/cosmwasm", rev = "v0.16.0", features = ["staking", "stargate"] }
+cosmwasm-vm = { git = "https://github.com/CosmWasm/cosmwasm", rev = "v0.16.0", features = ["staking", "stargate"] }
 errno = "0.2"
 serde_json = "1.0"
 thiserror = "1.0"