message: Update export cosmwasm_api_0_6 to cosmwasm_vm_version_1
diff: @@ -18,13 +18,11 @@ use crate::serde::{from_slice, to_vec};
  use crate::traits::Extern;
  use crate::types::{ContractResult, Env, QueryResult, Response};
  -/// cosmwasm_api_* exports mark which api level this contract is compiled with (and compatible with).
  -/// they can be checked by cosmwasm_vm.
  -/// Update this at major releases, so we can follow contract compatibility in the frontend
  +/// cosmwasm_vm_version_* exports mark which Wasm VM interface level this contract is compiled for.
  +/// They can be checked by cosmwasm_vm.
  +/// Update this whenever the Wasm VM interface breaks.
  #[no_mangle]
  -pub extern "C" fn cosmwasm_api_0_6() -> i32 {
  - 0x0603
  -}
  +pub extern "C" fn cosmwasm_vm_version_1() -> () {}
  /// allocate reserves the given number of bytes in wasm memory and returns a pointer
  /// to a Region defining this data. This space is managed by the calling process
  