v0.2.0 - better archive.org scraper, unit tests

support scraping multiple types of archive.org file list pages

* add scraper tests with example pages from archive.org
* add remote/local diff tests
* diff now ignores file size if the remote file doesn't supply it
* switch from hard coded Params to algebraic Options

v0.1.3 - inaugural build!

github workflows read version from go.mod