Upgrade to node 45

[humanagent]

Hey @rygine seems there is a breaking change for the helpers, flagging this one

examples/gm/index.ts:27:38 - error TS2345: Argument of type '{ getAddress: () => `0x${string}`; signMessage: (message: string) => Promise<ByteArray>; }' is not assignable to parameter of type 'Signer'.
  Type '{ getAddress: () => `0x${string}`; signMessage: (message: string) => Promise<ByteArray>; }' is missing the following properties from type '{ walletType: "SCW"; getAddress: GetAddress; signMessage: SignMessage; getBlockNumber?: GetBlockNumber | undefined; getChainId: GetChainId; }': walletType, getChainId

27   const client = await Client.create(signer, encryptionKey, { env });
                                        ~~~~~~