message: Use PubKey.encode instead of magic constants in code
diff: /* eslint-disable @typescript-eslint/naming-convention */
  import { fromBase64, fromHex, toHex } from "@cosmjs/encoding";
  +import { PubKey } from "cosmjs-types/cosmos/crypto/secp256k1/keys";
  import { SignMode } from "cosmjs-types/cosmos/tx/signing/v1beta1/signing";
  import { TxRaw } from "cosmjs-types/cosmos/tx/v1beta1/tx";
  @@ -20,13 +21,13 @@ describe("signing", () => {
  it("correctly parses signed transactions from test vectors", async () => {
  const wallet = await DirectSecp256k1HdWallet.fromMnemonic(faucet.mnemonic);
  const [{ address, pubkey: pubkeyBytes }] = await wallet.getAccounts();
  - const prefixedPubkeyBytes = Uint8Array.from([0x0a, pubkeyBytes.length, ...pubkeyBytes]);
  + const prefixedPubkeyBytes = Uint8Array.from(PubKey.encode({ key: pubkeyBytes }).finish());
  testVectors.forEach(({ outputs: { signedTxBytes } }) => {
  const parsedTestTx = decodeTxRaw(fromHex(signedTxBytes));
  expect(parsedTestTx.signatures.length).toEqual(1);
  expect(parsedTestTx.authInfo.signerInfos.length).toEqual(1);
  - expect(Uint8Array.from(parsedTestTx.authInfo.signerInfos[0].publicKey!.value ?? [])).toEqual(
  + expect(Uint8Array.from(parsedTestTx.authInfo.signerInfos[0].publicKey!.value)).toEqual(
  prefixedPubkeyBytes,
  );
  expect(parsedTestTx.authInfo.signerInfos[0].modeInfo!.single!.mode).toEqual(SignMode.SIGN_MODE_DIRECT);
  