Please update the readme or publish a new version.
This was fixed here: https://github.com/wulkano/kap-artifacts/commit/a82336736cea25ba05e5b459ad73ec63a9f92759
Thanks for letting us know @levrik, looks like https://kap-artifacts.now.sh/master is down (404) @karaggeorge and @sindresorhus. As a workaround you can clone master from GitHub.
master
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This was fixed here: https://github.com/wulkano/kap-artifacts/commit/a82336736cea25ba05e5b459ad73ec63a9f92759