message: Update CHANGELOG for gasUsed etc
diff: @@ -65,6 +65,10 @@ and this project adheres to
  - @cosmjs/tendermint-rpc: Add `pubkeyToAddress`, `pubkeyToRawAddress`,
  `rawEd25519PubkeyToRawAddress`, and `rawSecp256k1PubkeyToRawAddress` helper
  functions.
  +- @cosmjs/stargate: `StargateClient.broadcastTx` and `.getTx` results now
  + include `gasUsed` and `gasWanted` properties.
  +- @cosmjs/cosmwasm-stargate: `CosmWasmClient.broadcastTx` and `.getTx` results
  + now include `gasUsed` and `gasWanted` properties.
  ### Changed
  @@ -119,6 +123,8 @@ and this project adheres to
  - @cosmjs/cosmwasm-stargate: `CosmWasmClient.broadcastTx` now uses sync mode and
  then polls for the transaction before resolving. The timeout and poll interval
  can be configured.
  +- @cosmjs/tendermint-rpc: Tendermint v34 `TxData` type now includes `codeSpace`,
  + `gasWanted`, and `gasUsed` properties.
  ### Deprecated
  