Please add stepster

[walpurgisnatch]

Stepster is a web scraping library with convenient tools for json parsing.

https://github.com/walpurgisnatch/stepster/tree/main

Thanks.

[quicklisp]

Failure log here: http://report.quicklisp.org/2022-11-02/failure-report/stepster.html

[walpurgisnatch]

Excuse me. Forgot to merge in main. Fixed now.