Coin selection fails under certain condition

[cffls]

Describe the bug
Coin selection fails under certain condition.

To Reproduce
Failing test added to this branch https://github.com/Python-Cardano/pycardano/tree/coin_selection_fix

Logs

FAILED test/pycardano/test_txbuilder.py::test_token_transfer_with_change - pycardano.exception.UTxOSelectionException: All UTxO selectors failed.
Requested output:
 {
  'coin': 1492152,
  'multi_asset': {ScriptHash(hex='1f847bb9ac60e869780037c0510dbd89f745316db7ec4fee81ff1e97'): {AssetName(b'dux_1'): 382}},
}
Pre-selected inputs:
 {'coin': 4000000, 'multi_asset': {}}
Additional UTxO pool:
 [{'input': {
  'index': 0,
  'transaction_id': TransactionId(hex='e11efc26f94a3cbf724dc052c43abf36f7a631a831acc6d783f1c9c8c52725c5'),
},
 'output': {
  'address': addr_test1vrs324jltsc0ssuptpa5ngpfk89cps92xa99a2t6vlg6kdqtm5qnv,
  'amount': {
    'coin': 1038710,
    'multi_asset': {ScriptHash(hex='1f847bb9ac60e869780037c0510dbd89f745316db7ec4fee81ff1e97'): {AssetName(b'dux_1'): 1876083}},
  },
  'datum': None,
  'datum_hash': None,
  'post_alonzo': False,
  'script': None,
}}]
Unfulfilled amount:
 {'coin': -3546558, 'multi_asset': {}}

Expected behavior
Coin selection should succeed with provided inputs from the test.

[cffls]

Fixed in #445