message: Update CHANGELOG for Tendermint33Client
diff: @@ -11,13 +11,22 @@ and this project adheres to
  - @cosmjs/tendermint-rpc: `Tendermint34Client.blockSearch` and
  `Tendermint34Client.blockSearchAll` were added to allow searching blocks in
  Tendermint 0.34.9+ backends.
  +- @cosmjs/tendermint-rpc: `Tendermint33Client` has been added to provide support
  + for Tendermint v0.33.
  +- @cosmjs/tendermint-rpc: Exports relating to `Tendermint33Client` are now
  + available under `tendermint33`.
  -### Changes
  +### Changed
  - @cosmjs/tendermint-rpc: Make `tendermint34.Header.lastBlockId` and
  `tendermint34.Block.lastCommit` optional to better handle the case of height 1
  where there is no previous block.
  +### Removed
  +
  +- @cosmjs/tendermint-rpc: `Client` has been removed. Please use
  + `Tendermint33Client` or `Tendermint34Client`, depending on your needs.
  +
  ### Fixed
  - @cosmjs/socket: Upgrade dependency "ws" to version 7 to avoid potential
  