message: Add CHANGELOG entry for custom HTTP headers
diff: @@ -14,7 +14,16 @@ and this project adheres to
  - @cosmjs/faucet: Docker build image is 90 % smaller now (from 500 MB to 50 MB)
  due to build system optimizations ([#1120], [#1121]).
  -
  +- @cosmjs/cosmwasm-stargate: `CosmWasmClient.connect` and
  + `SigningCosmWasmClient.connectWithSigner` now accept custom HTTP headers
  + ([#1007])
  +- @cosmjs/stargate: `StargateClient.connect` and
  + `SigningStargateClient.connectWithSigner` now accept custom HTTP headers
  + ([#1007])
  +- @cosmjs/tendermint-rpc: `Tendermint34Client.connect` now accepts custom HTTP
  + headers ([#1007]).
  +
  +[#1007]: https://github.com/cosmos/cosmjs/issues/1007
  [#1110]: https://github.com/cosmos/cosmjs/issues/1110
  [#1120]: https://github.com/cosmos/cosmjs/pull/1120
  [#1121]: https://github.com/cosmos/cosmjs/pull/1121
  