PostedTransactions: support "WIRE" transaction type

[rtsai]

The "WIRE" transaction type is a result of issuing an outbound wire from the checking account.

Similarly to the "ACH" transaction type, map to the "CREDIT" or "DEBIT" transaction type based on whether the transaction is a deposit or withdrawal.

Mapping to "CREDIT" in this PR is done pre-emptively and speculatively; real-world test data is not available to verify/validate this mapping.

[rtsai]

I picked "XFER" (similar to "TRANSFER").

Full list of options: https://github.com/edwagner/ofxstatement/blob/c1f060042a0b7ae228d422d53cbac309bdf64147/src/ofxstatement/statement.py#L12-L30

Other candidates:

• CREDIT / DEBIT for incoming / outgoing wires
• OTHER

[edwagner]

My only concern with XFER is that wires are often payments which feels different than a transfer between accounts in the same ledger. However I'm certainly no accountant. Personally I like the idea of DEBIT for "Outgoing Wire." Does that seem reasonable to you?

[rtsai]

OK. I can use DEBIT for "Outgoing Wire".

I will also use CREDIT for "Incoming Wire" (although I don't have an actual sample for incoming wire to test this). Are you OK with pre-emptively and speculatively using CREDIT in this way (and blindly manufacturing a test case for this)?

[edwagner]

I think it's a reasonable speculation, and then we can change it (or add another case) if we discover that it's a different string. Thanks!