fix outdated transaction

Subxt(Rpc(ClientError(Call(ErrorObject { code: ServerError(1010), message: "Invalid Transaction", data: Some(RawValue("Transaction is outdated")) }))))

due to cache?

assigned to @pokapow

assigned to @HugoTrentesaux and unassigned @pokapow

https://github.com/paritytech/subxt/issues/1393

created branch 22-fix-outdated-transaction to address this issue

mentioned in merge request !23 (merged)

closed with merge request !23 (merged)