2.1.228
added gem 'asciidoctor-fb2', '0.7.0' (#320) * added gem 'asciidoctor-fb2', '0.7.0' * changed html-proofer version * update ruby version * corrected workflow scripts
added gem 'asciidoctor-fb2', '0.7.0' (#320) * added gem 'asciidoctor-fb2', '0.7.0' * changed html-proofer version * update ruby version * corrected workflow scripts