Uplift swanky-node to polkadot-v0.9.43

[prxgr4mm3r]

resolves #73

[ipapandinas]

3 tests are failing:

running 5 tests
test tests::instant_seal ... FAILED
test tests::instant_seal_delayed_finalize ... FAILED
test tests::manual_seal_and_finalization ... FAILED
test tests::manual_seal_post_hash ... ok
test tests::manual_seal_fork_blocks ... ok

failures:

---- tests::instant_seal stdout ----
thread 'tests::instant_seal' panicked at 'called `Result::unwrap()` on an `Err` value: EmptyTransactionPool', client/consensus/manual-seal/src/lib.rs:444:53
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- tests::instant_seal_delayed_finalize stdout ----
thread 'tests::instant_seal_delayed_finalize' panicked at 'called `Result::unwrap()` on an `Err` value: EmptyTransactionPool', client/consensus/manual-seal/src/lib.rs:534:53

---- tests::manual_seal_and_finalization stdout ----
thread 'tests::manual_seal_and_finalization' panicked at 'called `Result::unwrap()` on an `Err` value: EmptyTransactionPool', client/consensus/manual-seal/src/lib.rs:608:47


failures:
    tests::instant_seal
    tests::instant_seal_delayed_finalize
    tests::manual_seal_and_finalization

test result: FAILED. 2 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in 22.54s