Query: identify all double spends within a date range

[bitjson]

It would be nice to add an example query to chaingraph.cash to return all successful double spends which occurred within a date range.

This probably requires the same replaced_at index as https://github.com/bitauth/chaingraph/issues/16.

(A similar query which also returns attempted double spends would require DSP support: https://github.com/bitauth/chaingraph/issues/13)