[TABJS-7] Overwrite aliases config file on conflict

[dtbuchholz]

The current aliases logic will throw if you try to write an alias to a file if the key already exists. This should, instead, overwrite the aliases mapping with a new value.

Alternatively, maybe it's an overwrite option in the AliasesNameMap where it defaults to true, but you can choose if it should error and preserve the aliases file. But maybe that's over-engineering, though.

_{From SyncLinear.com | TABJS-7}