message: Update CHANGELOG for faucet fee table changes
diff: - @cosmjs/encoding: Add `limit` parameter to `Bech32.encode` and `.decode`. The
  new default limit for decoding is infinity (was 90 before). Set it to 90 to
  create a strict decoder.
  +- @cosmjs/faucet: Environmental variable `FAUCET_FEE` renamed to
  + `FAUCET_GAS_PRICE` and now only accepts one token. Environmental variable
  + `FAUCET_GAS` renamed to `FAUCET_GAS_LIMIT`.
  - @cosmjs/launchpad: Rename `FeeTable` type to `CosmosFeeTable` and export a new
  more generic type `FeeTable`.
  - @cosmjs/launchpad: Add new class `GasPrice`, new helper type `GasLimits` and
  