Log Message:
sift: update to 0.9.0

Also turn this into a Go module build because it's 2022.

Version 0.9.0 introduces several new options/features:

* --conf
* --field-sep
* --byte-offset
* Support for custom types

A detailed description can be found in this blog post:
https://svent.github.io/2016/10/23/sift-version-0.9-released/

This version also removes the cgo dependency while improving the
performance for line counting and case conversions.