message: Add initial MIGRATING entry for 1.0
diff: @@ -4,6 +4,22 @@ This guide explains what is needed to upgrade contracts when migrating over
  major releases of `cosmwasm`. Note that you can also view the
  [complete CHANGELOG](./CHANGELOG.md) to understand the differences.
  +## 0.16 -> 1.0 (unreleased)
  +
  +- Update CosmWasm dependencies in Cargo.toml (skip the ones you don't use):
  +
  + ```
  + [dependencies]
  + cosmwasm-std = "1.0.0"
  + cosmwasm-storage = "1.0.0"
  + # ...
  +
  + [dev-dependencies]
  + cosmwasm-schema = "1.0.0"
  + cosmwasm-vm = "1.0.0"
  + # ...
  + ```
  +
  ## 0.15 -> 0.16
  - Update CosmWasm dependencies in Cargo.toml (skip the ones you don't use):
  