message: Replace {Deps,DepsRef} with {Deps,DepsMut}
diff: @@ -26,20 +26,20 @@ major releases of `cosmwasm`. Note that you can also view the
  - Rename the type `Extern` to `Deps`, and radically simplify the
  `init`/`handle`/`migrate`/`query` entrypoints. Rather than
  `&mut Extern<S, A, Q>`, use `DepsMut`. And instead of `&Extern<S, A, Q>`, use
  - `DepsRef`. If you ever pass eg. `foo<A: Api>(api: A)` around, you must now use
  + `Deps`. If you ever pass eg. `foo<A: Api>(api: A)` around, you must now use
  dynamic trait pointers: `foo(api: &dyn Api)`. Here is the quick search-replace
  guide on how to fix `contract.rs`:
  _In production (non-test) code:_
  - `<S: Storage, A: Api, Q: Querier>` => ``
  - - `&mut Extern<S, A, Q>` => `Deps`
  - - `&Extern<S, A, Q>` => `DepsRef`
  + - `&mut Extern<S, A, Q>` => `DepsMut`
  + - `&Extern<S, A, Q>` => `Deps`
  - `&mut deps.storage` => `deps.storage` where passing into `state.rs` helpers
  - `&deps.storage` => `deps.storage` where passing into `state.rs` helpers
  On the top, remove `use cosmwasm_std::{Api, Extern, Querier, Storage}`. Add
  - `use cosmwasm_std::{Deps, DepsRef}`.
  + `use cosmwasm_std::{Deps, DepsMut}`.
  _In test code only:_
  